I tried to figure out what I did different this time than other times: I had problems with the bulk upload, I got an error. I searched here and found this article:
upload error
I removed jpegtran and after vthat, the bulkupload worked fine. But in fact that was maybe the moment that the webmaster account got the same name as the user I was uploading for.
I closed the gallery, so if you have any suggestions that would be highly appreciated!