American Homes 4 Rent Charge me twice for late fees when my rent was on time Las Vegas Nevada

I have only been renting from them 3 months now and when I paid my rent through a money order and mailed it in on the fourth of November I get an email 15 days later saying it was received on the 8th and it was a 73.06 late fee. I mailed it to the Durham NC office which is 20 minutes from where I reside and only takes 1 day to get there. Next I paid my December rent through their portal on the 5th and it automatically put in the 6th which automatic gave me a late fee and I paid it on the 5th not the 6th but it wouldn't take the fifth date, I called trying to get my issue resolve and there customer service had me on hold an hour when finally they told me customer service was down which made it down for 2 days and once I spoke with someone she continue to tell me that it was received on the 6th