I seem to vaguely recall either you or somebody else years ago already said that on the first quote. However, it gets allways attributed to him, both quotes, not just on internet quotation sites, but in print media and books as well.
So for the time being, I keep it simple and pragmatic, and do like others do as well. Both quotes by Benjamin Franklin, therefore.
To claim the opposite all of a sudden would not be believed by anyone anyway LOL. And if they are not by him indeed, at least their content is like that they could as well have been said or written by him.
I had just one book about Franklin, but it probably drowned in the flood we had three years ago, together with a good other share of my library.
At least I cannot find it anymore since then...