I think your board is using more then the minimum $3.50 because it shows as Variable in the database. I asked BbBoy to take a look at this but what you said is showing is what's showing in the database. So he put $13 back to it and it's showing $23 now at the end of the month.
It should be all set now, but you put 'Fixed' as the plan you had on the above post, did you want it to be on the Fixed plan because it's showing as Variable and when I went by last night I didn't get any pop ups. If you do want it switched back to Fixed let me know and I can get that done for you.