Lost support after wearing a few times

This brace is well made. I bought the medium as my upper arm measurement is 10". Out of the package it appeared bigger than my arm but when I tried it, it felt good. But after wearing a few times, it felt looser with less support. I'm a small female, 5'4" and 120 lbs. I thought maybe I should've ordered a small although per the chart I'm definitely a med. I contacted the support dept; they responded that they would send a small. I never received it. Also when I bend my arm it does "bunch up" a bit, hence the 3 stars for range of motion.

###

