Thank you, I'll try it. I usually develop along three different skill trees simultaneously to achieve absolute mastery. I choose randomly from these three directions. Does the order of selection matter?

Is this map by any chance mine? :)
(I've moved some racial skills to the general skills, but since it's a racial skill, it can't be forgotten, etc. - part of this is described in the manual, so it's impossible to obtain certain skills with some heroes, and they are already very powerful.)
Is the skill tree from that version of the game?
As noted, skills and abilities are forgotten when they are re-acquired. You can't take something out of the middle if there's something behind it (an arrow in the skill tree pointing to it).

Regarding "Scream of Terror" - it's a useless skill. Enemies still move even with -11 Morale (!), even though this means a 110% chance of a negative morale effect.

The player is most likely right; the chance to skip a turn cannot be greater than 50%.
Imagine a knight with Morale = 5 and Morale = -5. The difference between them is significant. (Cloak of Deathly Shadows, Ring of -2 Morale, Scream of Terror gives -10).