I dont remember, but yes I should have brought them all at once.Did you buy the nurse outfits all at once? If so you might have discovered a bug.
I'll test it later if no one else has by the time I get around to it.
Edit/Update: So far, I couldn't even do that in tfpatchguy's version and couldn't recreate the bug. Going to try przemo's version now.
2nd Edit: Couldn't get it to happen in przemo's either. I also tried getting the nurse outfit to trigger the "you've bought too many clothes this time" thing and still couldn't recreate the bug
Final edit: Also tried what maybe should've been obvious and turned on Skip Sylvie's reactions to new clothes and still couldn't get it to happen.
Truly Final Edit: The clothing cheat didn't cause it for me either. Should have tried it first though. lol
I'm interested in how this happened in the first place. Did you perhaps, save edit to unlock the clothing?
The nurse headband is the same in that it is also missing its name.