I do my stencil a little bit differently. I cut the stencil as is, and then I iron the whole thing on to the shirt. After that I pick off the pieces that don't need to be there then re-iron on the stencil.
That way makes more sense to me than bridges. I think it might just be me though. Who knows
I do it that way also, it's not just you! Heck of a lot easier that using bridges!
*going to make a Hello Potter handbag