Number of seats currently in use and number gotten by gitlab api is different at

I use with subscription and use one group having some subgroups and projects.

At billing information page, number of “seats currently in use” is 107.
But the number that i got by gitlab api with all subgroups and projects including top of group is 95.

Why the different number is occured?
Should i believe which number is correct, 107 or 95 ?

*.When i use gitlab api, i have Owner account for top of group.