FanDuel bonus tracker?

Getting a handle on those bonuses always gets tricky for me. I like to keep track of my playthrough and how much still needs to be wagered to actually unlock anything, but I haven't really found a way that feels reliable. The tracker tools I’ve tried don’t always update right or sync with what the account shows, which just adds to the confusion. I usually just end up with a notepad and a lot of second-guessing.

Anybody else run into problems with keeping tabs on these bonuses? Got any method you trust, or is it always a bit of a guessing game?