Focus of Spirit stacking with STR/DEX buffs - thoughts?

[phobus]

I hesitate to report this as a bug because I don't know for sure if this is classic or not, but I couldn't find evidence that it should work as it currently does on beta.

Focus of Spirit currently stacks with the Shaman STR/DEX buffs (Manicial Strength and Mortal Deftness) if those buffs were cast before Focus. Refreshing the STR/DEX buffs, or casting them after Focus, results in the 'your spell did not take hold' message.

That's the sort of buggy, broken stacking you found back on live (with the Fungi staff/regrowth/sow for example) so it wouldn't surprise me if this is classic behavior that's being correctly emulated, but it could be an actual bug, as well.

So.. to the devs, are these intended to stack in this fashion?

To everyone, did these stack at all in classic?