They could be nerfing their tests in order to gain membership, I don't know how I could know, I didn't have access to the test after taking it. The proctor told me an interesting thing, though, that something like half (IIRC) of the people who take the test pass. She attributed it to people who knew they would fail largely being intimidated (or sour-grapesing themselves) out of even trying.

That Mensa's test is (intentionally or unintentionally) shit is also a plausible explanation.