Thanks everyone. Mine have always matched exactly and I have always handed everything off to my accountant so I wasn't aware of the rounding allowance.
Lately it seems I've become conditioned to expect the worst. I have spent far too much time straightening out health insurance billing errors, questioning changes in utility bills, etc. times three as I've taken over managing finances for parents with Alzheimer's and hubby's 99 year old grandmother too on top of our own stuff. I just saw this as one more thing that would need fixing. Glad to know I can move on and not worry about it. The news made my night!