TR-8S - pattern changed right after saving

[sam]

I created a new pattern from scratch, changed some instruments, added motion recording. I pressed "Shift" and "Write" assuming that this combination will save my new pattern and my kit...
but once the pattern is saved, directly some instruments changed and I'm not sure if motions are changed or not because I got a total new sound after save.

What went wrong here? I didn't even turn off the device.