To make sure I do not have a second duplicate Footer tile, I created a new database, filled in dummy data, and created a form with only two tiles: a Data tile, and a Footer tile. Pretty simple.
Same problem. The bottom of the Footer tile is below the bottom of the page. If the Footer tile is short, no footer text is printed. If I elongate the Footer tile keeping the text at the top, the text will print. It looks like the bottom of the Footer tile is about 1/2 inch below the bottom of the page.
It is interesting that you can, in a special circumstance (duplicate tile) reproduce the problem. That shows that there is some sort of issue with the Footer tile. By experimenting, I found out that if you have 2 tiles of the same type, say 2 data tiles, only the second tile is printed. Same for 2 Footer tiles. That means that in theory, even if you have a duplicate tile, it should not matter. But apparently with your file, it does. So something is going on.
If my problem were widespread, many others would be jumping in here. So clearly it is something unique to my system. Since I have a very standard Mac setup, nothing fancy or special, I am coming to the suspicion that it is my “old” OS. I see from other posts on this forum that PanX does behave differently with different OS’s.
Probably no one, or very few people on this advanced forum are still using OS 10.11.6. So we may never know the answer to this conundrum.