Thanks for the suggestions all.
The stuff I used instead of dyanamat is a product called B-Quiet, I found a supplier of it here in Canada which cost at least
half the price of dynamat. It seems to be the very same stuff really, just a different name.
I guess I should just put aluminum foil on the non-foiled side then no matter what way I put it in would be correct.
I'm gonna have to start ordering from places that put a few instructions in with the items.