Lending Club Loan – Questions

Hello! I made some dumb decisions in college and racked up about $15k+ in credit card debt and was approved for a Lending Club loan for about $480/ month. I had a few questions for anyone that may have had a LC loan before.
1. If I make $800 worth of payments in a month, would that count towards my next payment? Or would it just lower my principal balance?
2. If I make an extra payment online that’s more or equal to my monthly bill, will that “cancel” my auto-pay for the month or will it still take the $480 on that day.