Hi Dinesh,
I believe the issue is related, probably, to your date range. If you have a long date range, the dimension will show all the hits associated with the user ID. Have a look in the example below:

Because my date rage is almost a month of data, I'm pulling all the hits associated, to this user, with the "days since last visit" as a dimension.
This might be the reason you're seeing multiple figures in the dimensions.