@Willysee999 Update 2:
Milestones -> Return Punts / Kickoffs Yards 81/300 is definitely NOT updating correctly.
I was short of the 50 yards threshold before starting another regular Solo Battle (10% arcade difficulty). I checked the Stats area after each additional punt return + the single kickoff return I had during the game and according to in game stats, I had 130 yards.
When the Solo Battle was over, I got message that I had been rewarded 4445 experience for going past the 50 yard Milestone, but with 130 yards actually made during the game, I should have gotten TWO Milestones, 50 then 100. When I checked the area in Field Pass, it lists me at 81/300 which is not even close to correct! I had almost 50 (incorrectly added from previous game -- I should have already been past the 50 yard mark from the Solo Season game + the first Solo Battle game and now the second Solo Battle game should have gotten me past 150 yards -- but it only gave me 81 for all the yards I got in those three games).