Error counting reseller users

Hi

I have a reseller who had not user limit, but recently I put them a "2000 users" limit.
Everything seems ok in ispconfig panel. "statistics" for that reseller says "Users used: 535 of 2000".

Then problem is from time to time (and only since I put 2000 user limit) reseller gets the following message when they try to add an user:

You have left only -3192 user(s) which you can assign to this website.

They can finally create users with no problem, but the message is very annoying.

Is there any known bug about this? Is there any problem with my concrete installation?

Thank you very much

 

I can get you all the information you need.

Thank you for your quick answer

 

Only a question about this bug...

Does it have something to do with the "Bugfix: Fixed a bug in the reseller limits." fixed on 2.2.10?

I'd like to know if I could activate reseller's user limit again

Thank you!