I can see all of my mems in timeline and all mems view on my Macbook Pro and my iPhone. When I open the macOS app on my iMac, the app displays the correct # of mems, but I only see from 7/22 to current in timeline and all mems view.
Your account just needs to sync with the server. Please try to refresh. If you still can't see all your mems, please clear your cache. get.mem.ai/help-and-support/how-do-i-clear-my-local-cache.