Unpredictable Action Buttons

I've created a U.S. map with 51 freeforms (one for each state + DC), each of
which activates a corresponding, simple 2 X 2 table (also 51) that enters
offscreen from the left, displays then exists right after it is clicked. All
of them enter without problem. However, each table either exits or brings in
another table, depending on what part of the table I click. As long as I
click the very left edge of the table, it exits the way it's supposed to. If
I click inside the table, it either advances to the next slide or brings in a
table linked to another state. I've made sure that the stacking order has
placed all action buttons underneath the tables. The tables themselves are
stacked in alphabetical order (one on top of another) on the pasteboard to
the left of the slide. Each travels on a straight motion path. I'm using
PowerPoint 2003 for Windows. Anyone seen this before?
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