Unfortunately, the fixes for these skills in the original download version were accidentally lost when a new bug was patched shortly after, and when Larian re-released the game on Steam there were problems with the backups (see Hatching the Anthology).

From a kickstarter comment:
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@JM: We tried to bring it as close to patched level again as we could, but we'll actually never know. I know there's still some bugs that we need to solve & we need to get some free hands to work on it. What happened basically is that the programmer who worked on it left the company, and we didn't have anybody ready to replace him. You are right in reminding us.