Different pages across YouTube (such as the logged in homepage, search & analytics) are updated at different intervals. It is a common occurrence that the count for the same channel may vary on these pages at the same time.
Appreciate the info. Please send a feedback report directly from YouTube with these steps: https://goo.gl/WdI0BK . While every individual report may not get a direct response, we do review everything and use the details to investigate and fix issues. Thanks!