I just want to point something out. A google search of "affirming denominations", brings up this list.
List of Christian denominations affirming LGBT - Wikipedia
Now, I realize Wikipedia is not the most reliable source, but it is relied upon, and I would guess that all of us has looked stuff up on Wikipedia.
I noticed that each listed affirming denomination, if there is something to clarify about their position, has a little clarifying blurb beside its listing. Even little obscure denominations nobody's heard of. The biggest mainline denomination in Canada has no clarifying blurb. So, if I were looking for fully affirming congregations, I would assume they are fully affirming and their position doesn't need clarifying. The assumption of whoever put it on the list is that their position doesn need clarifying. It seems to me that the public presumption among non-UCCan folks is that being affirming, and welcoming full participation of LGBT people, including marriage, are the same thing.