I noticed after completing a match I get a set of rewards, shown at the end

I'm confused because most of these rewards I'm not collecting, so for example that's the amount of 7 Star awakening shards I have and it says 600
But after closing out the quest, it still shows me I have 7,500

It showed in some rewards I've gotten mysterium, and not all but a few was added to what I already have.
Do these rewards accumulate at the end or it's picking and choosing what to give ?
Because I can't understand getting a few mysterium and a few selector picks but all of the rest shown haven't reached my account.