Credit issue?

Hello! Sorry, this isn't really a big problem, its just kinda annoying. So; this morning I rolled a nat 20 on the credits thing, so I got 25 credits. I used only 3 of those credits, (Technically message 1 and 2 rewrites) and now im looking at how many credits I have, and it's saying I only have 1 left. I asked over in queshtions, they said it was a glitch.