RE: Silly question about tissue paper covering
Those are all GREAT Articles to start with.
A little simpler answer to your question. Yes, the overlaps are thicker, but you're talking the thickness of a couple of strands of hair. Absolutely nothing to be concerined about.
By the way I've been using the UHU glue method for the last two years and I'll never go back to using dope to attach tissue to a model.