yesterday night i just check total number of users in admin panel 

it was 230

today morning when i refreshed page i saw number of users become 240 

i had a doubt i checked main page ..found none joined within 1 day 

then i looked at browse users in admin panel and i manually counted number of users .

found total number of users are just 210 (counted like 5 times same results )

but the list shows like

BROWSE USERSTotal: 240 users

......................

i dont know if its happening with all of you caz ..please have a look because  it might be happening to all sites..

 help and suggestion please... :(