Elements: Uploaded Photos on Facebook don't appear in Albums

I uploaded approximately 47 pictures to Facebook but my album shows 7 sometimes and 2 at other times. I have only seen all 47 once and that was on my iPhone. However, my friends have left either comments or "likes" on some of the photos that are not in the 7 or 2 that I see. What has happened? I have uploaded photos for a long time from Elements to Facebook and never had this problem.