there is a page width a lot of images every image got a different like button. After changing the site to https the like-count resets (because the like-links also changed to https).
Is there any way to combine both existing counts (https and http) after that hilarious actions i made?
Just asking... xD
Try using the http link in the og:url parameter, instead of changing it to https for SSL pages.
This is also explained in other threads:
Combining the counts is not possible, as it´s a different URL.