Board Game Arena

I have the view advancement lvl 1. I choose to move my forklift to lvl 1 of anything and choose tiles. It showed me 2 tiles lvl 1 both the same. I picked one and put it into my Assembly beside another I had of the same type. Little x and check mark appeared, I picked the check mark. The tile disappeared, and the two that I was able to look at also disappeared and could only end my turn.