Bank of America App - Credit Card(s) feature, primarily

I'm curious if anyone has experienced what I'm about to describe, which occurred under iOS with VoiceOver. While working with someone else yesterday who uses the BoA app, we encountered remarkable bugs in the iOS version of the BoA app. She manages most of her banking, and that includes making payments on her credit card, using the app. She noticed over the last two months that her account balance seemed to be inexplicably increasing, quickly, but with no corresponding warnings from BoA nor transactions to go with it in the app. What turns out to have happened is that she somehow overpaid her bill, by several thousand dollars, and the amount was shown as something like (format correct, actual value was different): -$5,217.93 The actual balance is negative, that is, a credit balance. But VoiceOver in the app is NOT reading the minus sign, so it sounds like that amount of money is the outstanding balance owed. How she got there is because the first "half" of that amount was an overpayment last month, probably due to a typo, but it was shown in the same way, and with the negative/minus not announced after the payment. This last month, she thought that she owed "the half" rather than it being a credit, and paid it again. I find it shocking, actually, that the minus/negative is not being read to begin with, but even more shocking that the app will accept an overpayment of that scale. The app for my Visa card will not allow you to pay more than the outstanding balance as of the date of the payment. If you attempt to pay again after having scheduled a payment previously, it will prevent you from doing so if the last statement balance had been paid initially. What's even more fun is that in the banking part of the app it's reading a transfer of $10,000.00 as "Ten dollars dot zero zero," entirely ignoring the ",000" part, even though it reads the balance, which has the same format, e.g., $16,297.13, as, "Sixteen thousand two hundred ninety-seven dollars and 13 cents." Also, as an aside, if we log in to the same account via the BoA website on the PC, the negative/minus sign on the credit balance for the credit card is read perfectly normally by JAWS, which is the screen reader she's using and learning on that platform. I strongly suspect a bug in the BoA app rather than VoiceOver because of the differences in how values are being read even when they share the same format. Let this serve as a warning, and also a query as to whether anyone else has ever experienced this?