I don't think it's going to make a material difference, but I don't want to be eating my words, because we've made the material distinction between the two. I think it's just easier to go with Madam Khalid's suggestion that “and/or” works better than “and...and/or”.
We're getting into the weeds here. I like the way we've been working collaboratively. I think there's a way for us to do it.