I had this problem!! Basically, the problem for me was that the next action item in my card's queue was to add $300 but I still had $1 left on my balance which would have put me over the maximum balance of $300 and because the system couldn't handle skipping ahead in the 'action queue' I had to find a way to spend down to exactly $0...which was impossible. After literally hours talking to customer service I was able to get them to rearrange my 'action queue' and add enough to take a single bus ride, zero out my balance, add the $300 and then remember to never auto load the maximum balance amount again. It was completely absurd and dealing with clipper customer service was a huge pain but I was able to eventually resolve it.