I had a similar issue in Avid Adrenaline. After reformatting a squeeze to letterbox there was one row at the top that was half white. I used a black matte overtop of the letterbox reformat to get rid of it.
The way I understand it, 24p uses a 2:3 pulldown, 24pA utilizes a 2:3:3:2 pulldown. So it all depends on your timeline. If you edit in a 60i timeline, use 24p. If you edit in a 24p timeline, use 24pA.
select the city closest to you on the right, then read some of the posts the selling forums. it’s basically a “name your sell price and wait” type deal. No Fees.