Don,
What Mike said is that without the cam button the timing was "...all over the place." This means that as the cam shifted fore & aft, the cut of the gears shifted the timing. It does NOT say that it caused the distributor housing to move relative to the block, changing the timing. I'll say it again, if your distributor housing is moving on the block, you've got a distributor problem. There shouldn't be ANY torque transfer from shaft to housing.