I was in a similar situation wherein my mother was a joint account holder. However I was the primary account holder and I got a notarized statement from my bank which mentioned only my name.
This point aside, my advise to all aspirants is this: As long as all your other documents are in order especially those pertaining to your finances like pay-stubs etc., any one documentation/item will not cause any adverse impact to your application. Worst case scenario, you might be asked for an explanation.