My bad on the terminology but yes, I'm seeing the 6x float up (and 7x in one case) but not getting the achievement and no, I don't already have it (just checked). I've done this in both brainteaser mode (set up a custom puzzle, which is cheating, but I'm a small person when it comes to free stuff
) and then in a custom action game (which I'll confess I set to only two colors, again I'm a very small person sometimes
). In neither case did it trigger. If "massaging" the system doesn't generate it that's fine, of course, but if that shouldn't matter then I'm not sure what's going on.
Edit: It's worth noting that I've accidentally generated some other achievements (like Block Sweeper 1) while doing this, so it's not that those aren't working.