Thanks, I tried this, but unfortunately it turned out almost exactly the same. Thinking it may be another issue? Of note, prior to your helpful response on the other thread about using @Align_Centers, I had processed this participant's data in MNI space and had similar problems. Apologies, should've noted that before.
Regarding the pb00 filename, that's just one of those things that someone in the lab started over a decade ago and has never been changed for the sake of consistency.