I've been in the process of shooting down spy planes for the Ghost perk. I was checking the challenges menu after each match, but the number of aircraft shot down doesn't always increase. For some it did, but for others it didn't. Has anyone experienced that? Maybe it is a delayed process and will add to the count later?
I had it happen again with playing demolition; I needed 2 plants to get to Ninja Pro, I got 5, and it gave me credit for only one.
What's causing this to happen, and is there something I can do to fix it?