To my knowledge there should be no issue with having multiple controls bound to the same data source with different formatting on them (again, you know what I'll say -- test in a sample form. Create a repeating group in your data source, add a bunch of controls on the form bound to that table, set them with different formatting -- in fact, you probably have a sample form from earlier in this discussion that shows this).
If it were my form, I'd probably take a somewhat nuclear approach, set postback to always on my tables, controls in tables, controls outside of tables that affect my tables, anything that I think could be causing the problem. Publish, see what happens. If things start behaving the way you anticipate, then you can gradually start changing the postback on your controls back to a more conservative approach, and check after each change.