Today I reached the max milestone for the 4* basic arena (1.5 mil points) and I'm pretty sure that I got the milestone rewards twice. I claimed them once when I reached it, then two fights later I got the prompt for them and received them again, and I did see my units go up. While I am not opposed to free units, I figured I would let someone know... I've been working on this account for several years and would appreciate it if my account wasn't banned for a possible exploit(?)/bug.