We'd like to help. Mind sharing more details of the issue for us to look into it? Also, take a look at this Help Center article which may help you: https://goo.gl/JtQrNW . Keep us posted.
Different pages across YouTube (such as the logged in homepage, search & watch pages) are updated at different intervals. It is a common occurrence that the total sub count for the same channel may vary on these pages at the same time.