Will one shipped late really get my account suspended?

I do not get many orders as FBM about 1 per week. I forgot about an order that came in yesterday and shipped it late today. I upgraded the shipping to express mail so it will still make it on the first estimated day. However I now have a 20% SLR. Will amazon really suspend me for one order shipped late?

Should I drop prices to try and dilute the one order shipped late or does Amazon allow for one shipped late order in 10+ years even when the SLR goes above 4%?