How to get User List of the portal from DNN Cache?

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'Dim uc As New UserController ' too much calls to DB (UserInfo)
'userList = uc.GetUsers(PortalId,True,True)

go
exec dbo.GetUserProfile @UserID=3
go
exec dbo.aspnet_Membership_GetUserByName @ApplicationName=N'DotNetNuke',@UserName=N'XXXXXXXX',@UpdateLastActivity=0,@CurrentTimeUtc='Jan 13 2010  8:47:13:743AM'
go
exec dbo.aspnet_Membership_GetUserByName @ApplicationName=N'DotNetNuke',@UserName=N'XXXXXXXX',@UpdateLastActivity=0,@CurrentTimeUtc='Jan 13 2010  8:47:13:743AM'
go
exec dbo.GetUser @PortalID=0,@UserID=3
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserCountByPortal @PortalId=0
go
exec dbo.GetUserProfile @UserID=3
go
exec dbo.aspnet_Membership_GetUserByName @ApplicationName=N'DotNetNuke',@UserName=N'XXXXXXXX',@UpdateLastActivity=0,@CurrentTimeUtc='Jan 13 2010  8:47:13:773AM'
go
exec dbo.aspnet_Membership_GetUserByName @ApplicationName=N'DotNetNuke',@UserName=N'XXXXXXXX',@UpdateLastActivity=0,@CurrentTimeUtc='Jan 13 2010  8:47:13:773AM'
.....................................

I can't understand why  each calls to dbo.aspnet_Membership_GetUserByName   generate ~20 calls to dbo.GetUserCountByPortal @PortalId=0
 (return UserCountByPortal)

I thought this was fixed in 5.2.1? I am seeing the same issue in 5.31 currently on a Dev box I have running. It is running a lot more that 20 times. I did notice that the providers are still listed as 5.2.0 with the 5.31 one upgrade package. Is that correct?