First with so few games completed, you will see the ratings do many funny things.

Second - When you win against lower ranked players, you rating may not change. Actually, with so few games complete, you could actually LOSE points when you win a game against a lower ranked player (But Fencer made it so you actually never lose points, even if the ratings formula says it should)

Third: You rating is also rounded/trunkated. So even though you think your rating has stayed at 1700, it may have actually been 1700.0, then 1700.2, then 1700.4