Bug with "Watched" Movies item counts?

I just noticed this recently, in "My Movies" sidebar, the "Watched" list says 557 items, yet the main part of the page says 556 items. Is there some explanation for this discrepancy? Anyone else notice this or am I special?

If it isn't clear I can post a screenshot.

It's happening to me too (678 and 674). It seems to be a recurring problem.

Same here. On the sidebar, it says 720 watched, but actual list (and I counted it) is at 713. Always 7 off for me.