I am getting different rank and getting same points for contests.And the problems i done are not visible in the account.
@anon15385306 - can you share some screenshots / contest ids where your problems are not visible in the account?
You can get same points and different ranks across contests. Supposed that in 2 separate contests - you solved 3 problems each. Your rank in 1st can be 1000 and 2nd can be 3000 depending on when we received your submissions.