key change bug???

i was writing a score for soprano sax in the key of concert c flat or d flat for soprano. i was editing staff properties and when i hit ok my key had changed from d flat to a. it only changed for soprano(the piece has an alto and bari and neither of them changed). ive tried ctrl+z and manually undoin the edits i made to the staff but its not changing back. please help the soprano part is riddles with accidentals. i included a photo of the problem in case of confusion.