Thanks for your feature request. We have added it in our backlog which will be prioritized based on other items. We will keep you posted with the progress.
An error occurred while saving the commentPeter Murray commented
It does the same thing when opening files as when combining them. My files are named with a number as the first character of the file name, and that is the order I want to see them in. They open in a random order, then I rearrange the tabs to the order I want them in, then I hit the "Combine Files" button, and they wind up in a completely different, completely random order. Why is this so difficult for Acrobat? More importantly, why hasn't this been fixed after more than two years?