I seem to have a phantom rounder. When I had a delta, a gamma, a beta, and an alpha, it said I had 5 rounders.. I then used all of my rounders, and the display still said 1 rounder. Refreshing the page did not solve the issue.
EDIT: I found it by zooming IN of all things. There should probably be a confined area where rounders can spawn, rather than whatever caused this weird phantom rounder.