Issues with Handling Time

I drop ship coffee mugs on Amazon, sold a few with no problem. Then out of nowhere Amazon lets me know my account is at risk for deactivation. I called and they said it took too long to mail my product. They apparently are big on handling time, yet Amazon only gives me 1 or 2 days handling time options. I know another seller that has 4 days, I don’t understand the discrepancy.