I'd like to clarify some things, since I am not sure if I understand.
Example:
I have folder of images, taken with different camaras through the same day and I wanted to have them sorted by "Date Taken". Not sure if "Exif Date" is the same feature, but if I sort by that, it looks normal. It can also be right because I edit images as they were taken and maybe that's why it works.
When I look images in folder via XnViewMP, they are sorted OK. But when I go to view mode and scroll through them, something is not working. Some images are left out of the viewing mode.
Is it possible that this is due fact that they are from different cameras? Although, it shouldn't be the problem. But I noticed that where name of files changes, XnViewMP skips those files, although they are sorted right when I view folder.
For example, I tasted same thing with XnView, and everything works there. The problem with XnView is that with custom ICC porfile, everything is to slow.

Any idea?
Also...I noticed that request for "sort by Date Taken" was on the forum. Was this feature left out from future updates?