I've had this problem for a while now, my profile often doesn't save my messages. No matter how many messages I post in a day, it will only add 1 message or a few onto my total account messages. Last night, I sent some messages and I got into the 70s of my total messages but now it has taken off some and now I'm back in the 60s. I have also checked to see that my messages were deleted but they weren't so it has just taken messages off of my total without removing them.
I don't think so, I think it might be my account meaning I'll just have to deal with it or create a new account.
Have you asked someone in the staff team what they think? If not I guess a new account and ban this. :3 ;(