Daph Duck is correct. A similar topic about Malfunction was brought up last year, and was resolved as the answer being that the said skill unlocks at a different level for said classes. For reference, you may have a look at the thread of which I am speaking of by clicking this link here.
The berserker killer -> RE: [RESOLVED] BloodMage Bludgeon (3/25/2016 16:15:49)
I thought so too Daph Duck so I did my research and examined all dns for the past year and noticed that Rabble said "Bludgeon" in general, not just TechMage bludgeon.
Stat requirements for skills depend on their level, so this isn't a bug. I did a quick search and couldn't find any DNs that mention stat requirement changes for bludgeon within the past year so feel free to PM me with a link to the DNs you're referencing if you think that change wasn't applied properly.