Sometimes, if I go into my profile and click on 'find all threads started by ...' or 'find all posts by ...', it comes up with a list of results but with the most recent results omitted. For example, I started a poll in the storage forum in the last few days about whether people have had problems with their SSD and that doesn't show in the results list (yet it has appeared as it should on previous occasions).
The most recent result I'm seeing in 'recent posts by me' is one from a week ago about international calls, even though I would say there should be three or four more recent entries, such as the SSD poll (which exists in the storage forum if I find it manually).