New ranking system? ranking sort?

what is the ranking sort in SoStronk? I am in rank PUG master now is that good or bad?

See https://www.sostronk.com/blog/revamped-pug-matchmaking-ranks

However, there was a bug in the ranking system that made you PUG Master too quickly. Its fixed now and your real rank will be calculated once you play one more PUG.