Hi, I'm not sure if this is a bug. I'm playing with the "Scale Skill Difficulty to Age Span" (Age Span set at 270 days) and the Handiness skill seems to grow at normal speed while fixing objects (like the shower or the toilet). Fixing one of those raised up an entire level of the skill (at lower levels). The other skills seem much slower in comparison.
On a side note, is there a list of changes to the story progression of the mod? I've read the RTFM but there's not a description of what it actually change the story progression (things like emigration, immigration...).