Just playing a few ranked games and this isn't adding up to me?

After the first game i played i was 3-1 vs a ranked 8 player. This positioned me at rank 135. Some how there is many players with scores worse or the same, but they are much higher ranks like all the way up to 20.

I doubt they beat players with a higher elo than i did as rank 8 is pretty up there?

I then played again against ranked 110 and went 3-0 making me 6-1 in total.. putting me up to rank 40. Still i am behind players with much worse scores

Can someone explain this to me?