*BUG* Fantasy LCS Removed My Support, Please Help

with less than an hour till roster lock, one of my leagues won't show my Support role, or let me add one to my roster. anyone else ever run into this issue?

to clarify, I have 3 total leagues, and this is only happening for one of them.

UPDATE: Update: I was able to move Yellowstar to the Support roster spot, but now I only have 2 subs. Another poster outlines the same problem with someone else going all the way back to week 2, now he only has one sub. Please advise!

UPDATE (2): Also cant do anything with Safari on an iphone 6 plus

FIXED didn't know you could add players without dropping, or vice versa. just needed to add another support (just select one from available players, hit trade button without selecting anyone from my roster). issue with mobile site still persists.