Noticed my word learned count stat on my public profile page is still at 2946 even after adding a few hundred more words. Only difference has been using the Autolearn feature so I assume the stat is not being updated when autolearn used. Likely a bug given that in my learning stats to total words in the graph is accurately displayed.
Not a big deal, but might as well be accurate. People do like to show off after all.
I had that quite often: the items counter needs some time with the update when one is using autolearn, sometimes even a long time (days and days). Depends on the “batch” as well - and also, if you quit and rejoin your own courses, as I often do, then the upgrade needs even more.
nonetheless, it could be a new bug as well 
I encountered this problem too. In order to update your word count after auto-learning your own courses you need to reset or restart a level inside of one course, be it your course or a course from another creator. After resetting/restarting one level, you trigger Memrise to update the word count. What I do is, I’ll always have one level inside of one of my courses with only one word, so whenever I auto-learn many levels I can reset that one word level to make the word count update itself. 