My guy hit a 50 yarder today and it counted on his 50+ total.
My guess is that the Play-by-play rounds to the nearest .5 but the stats do not round. So if you hit a 49.9 yard FG, it would count as a 40-49 yarder (which is more accurately 40 <= x < 50) in your stats but show on the PbP as 50 yards.