Hi all,
I have a similar (possibly same) problem. First appeared when all my photo albums showed up twice in gallery (started after I inserted an external SD card). Not sure if this is the same problem you all have, but here's what mine seems to be... Looking at the duplicate pics, one set is located in /mnt/sdcard and the other is in /storage/sdcard0. But these are actually both the same location (I suspect /mnt/sdcard is a link to the /storage/sdcard0 folder or vice versa). Following either folder leads to the same ultimate directory, confirmed by deleting a file in one location and having it disappear in both. This explains why there are twice as many storage cards (both /mnt and /storage have a folder for each card) and twice as many pictures. Next question... is there a way to hide/eliminate one safely without root access? Hope this helps...