Asc 3 rn, match mvp games, get +16 rr
lose a game, -20 like bro wtf is going on
you need to get immo 1 50rr+ and end your act there to have your MMR fixed like this:
Gain - 21rr
Loss - 17-19rr
You started the act as Ascendant 1 and now you're close hitting immortal so till next act your mmr will stay the same as it is rn. So just make sure you end the act with more than 50rr in immortal and you'll be fine next act