Using your last version on iPad 5.1 (680), I noticed that the field “many to many” doesn’t have the “field option” or “field settings” in “customize form” panel, indispensable to select if you want include or exclude this field while export in pdf or in print action.
Thanks for your great update!
Tap on the Link Type option and you’ll see the Email, Export, and Print Field options on that screen. I should probably rename that to Field Options to be consistent with the other field types.