Incorrect boss position during spell practice

Specifications

Versions: 1.00a - 1.00b - 1.00c
Difficulty: Easy - Normal - Hard - Lunatic - ~~Extra~~ - ~~Overdrive~~
Mode: ~~Main game~~ - ~~Practice mode~~ - Spell practice
Shottype: Reimu - Marisa - Sanae - Youmu

What happens

The boss's initial position in spell practice does not match the boss's position outside of spell practice mode. This happens to the following spell-cards:

Yuyuko's second spell-card (5, 6, 7, 8); (32 units higher in spell practice)
Yuyuko's third spell-card (9, 10, 11, 12); (32 units higher in spell practice)
Seiga's first spell-card (48, 49, 50, 51); (32 units higher in spell practice)
Futo's second spell-card (67, 68, 69 ,70); (16 units higher in spell practice)
Miko's fifth spell-card (95, 96, 97, 98); (16 units lower in spell practice)
Miko's sixth spell-card (99, 100, 101, 102); (16 units lower in spell practice)
Miko's seventh spell-card (103, 104, 105, 106). (56 units higher in spell practice)

The numbers in parentheses represent the spell IDs.

How it happens

This is done by going to the boss's spell on any difficulty in Spell Practice. The boss automatically skips over some instructions it would otherwise do outside of spell practice. The boss may therefore not move or have a wrong movement limit.

Why it happens

The reason why the boss has an incorrect position varies from spell to spell.

In the following sections some visuals will be provided of modified in-game screenshots.
The blue box represents the movement limit of the boss outside Spell Practice mode. The blue bullet represents the boss's position outside Spell Practice mode.
The red box represents the movement limit of the boss inside Spell Practice mode. The red bullet represents the boss's position inside Spell Practice mode.

Furthermore, the coordinate system in Touhou doesn't use the normal Cartesian coordinate system. Instead, the y-coordinate increases if you go downward and the y-coordinate decreases if you go upward.

Yuyuko's second spell-card (5, 6, 7, 8)

In spell practice, Yuyuko has a y-range of [96, 160]. She is programmed to move to y = 192. y = 192 is outside the range of [96, 160] so she can only move to y = 160.
Outside spell practice, Yuyuko has a y-range of [32, 224] She is programmed to move to y = 192. y = 192 is inside the range of [32, 224] so she moves to y = 192.

Two fields are shown that represent the movement boundaries on Yuyuko's second spell-card — Figure 1: Visualisation of the movement boundaries and initial boss position on Yuyuko's second spell-card.

Yuyuko's third spell-card (9, 10, 11, 12)

Two fields are shown that represent the movement boundaries on Yuyuko's third spell-card — Figure 2: Visualisation of the movement boundaries and initial boss position on Yuyuko's third spell-card.

Seiga's first spell-card (48, 49, 50, 51)

In spell practice, Seiga has a y-range of [96, 160]. She is programmed to move to y = 96. y = 96 is inside the range of [96, 160] so she moves to y = 96.
Outside spell practice, Seiga has a y-range of [128, 192] She is programmed to move to y = 96. y = 96 is outside the range of [128, 192] so she can only move to y = 128.

Two fields are shown that represent the movement boundaries on Seiga's first spell-card — Figure 3: Visualisation of the movement boundaries and initial boss position on Seiga's first spell-card.

Though, it is barely noticable that she spawns on a different height. This is because the movement limit of Seiga is changed once she starts moving.

Futo's second spell-card (67, 68, 69 ,70)

In spell practice, Futo has a y-range of [96, 160]. She is programmed to move to y = 96. y = 96 is inside the range of [96, 160] so she moves to y = 96.
Outside spell practice, Futo has a y-range of [112, 144] She is programmed to move to y = 96. y = 96 is outside the range of [112, 144] so she can only move to y = 112.

Two fields are shown that represent the movement boundaries on Futo's second spell-card — Figure 4: Visualisation of the movement boundaries and initial boss position on Futo's second spell-card.

Though, it is barely noticable that she spawns on a different height. This is because the movement limit of Futo is changed once she starts moving.

Miko's fifth spell-card (95, 96, 97, 98)

In spell practice, Miko moves to y = 144. An instruction that tells her to move to y = 128 is skipped.
Outside spell practice, Miko goes to y = 128.

Two fields are shown that represent the movement boundaries on Miko's fifth spell-card — Figure 5: Visualisation of the movement boundaries and initial boss position on Miko's fifth spell-card.

Miko's sixth spell-card (99, 100, 101, 102)

In spell practice, Miko moves to y = 144. An instruction that tells her to move to y = 128 is skipped.
Outside spell practice, Miko goes to y = 128.

Two fields are shown that represent the movement boundaries on Miko's sixth spell-card — Figure 6: Visualisation of the movement boundaries and initial boss position on Miko's sixth spell-card.

Miko's seventh spell-card (103, 104, 105, 106)

In spell practice, Miko moves to y = 144. An instruction that tells her to move to y = 200 is skipped.
Outside spell practice, Miko goes to y = 200.

One field is shown that represent the movement boundaries on Miko's seventh spell-card — Figure 7: Visualisation of the movement boundaries and initial boss position on Miko's seventh spell-card.

In this case, Miko does not have a movement limit outside of spell practice, so there is no blue box.