One of the ADOM.CFG options I always use is Sorted_Skills = false (one of the reasons is so that way first aid, which I use a lot, is always B). But now they are always alphabetically ordered when looking at the skill list via shift+a. This is at least with newly generated characters - I don't know yet where a skill attained during gameplay goes.

Furthermore, when quick-marking skills, the numbers don't go to the skill the letter of which I press.

To test what was going on, I tried to assign the numerical quickmarks as follows (basically, alphabetical order):

0-A
1-B
2-C
3-D
4-E
5-F
6-G
7-H
8-I
9-J

Instead I got arbitrary results. For example, when I pressed B, the quickmark went to the skill with the letter E. My assumption is that the quickmarking followed the unsorted ordering of skills instead of what I was shown on-screen. With my character, the skill with the letter E was first aid, which would be B in unsorted.