Just made a new account

The site uses the Glicko rating system which includes a measure of rating uncertainty called the rating deviation (RD) value. That will cause larger rating changes after games and as you play more games the value will drop and so will the rating changes.
Until you get enough games completed, you won't know if you just are having some good results and will maintain the rating or if it will start dropping closer your rating on your other account.
Also, if you didn't get staff approval before your new account, you should.
https://support.chess.com/article/596-can-i-have-multiple-accounts