Ok, I think I know what you’re asking.
I am away for a couple of hours yet, so it’s my opinion, without testing it.
1. Nope, 2 Sweeps, one (different) profile for each.
2. When I first got the Sweep to work, your original profile created a tunnel in the curved end,
similar to yours but almost right, so I made your profile wider to take the tunnel wall out, to the inside of the curve. (Wasn’t dimensioned)
At that time the the profile sketch was not divided, so having done that, Sweep, I had to return to original profile when Sweep cutting the tab, edit sketch and added a new dividing line at the old size, and so I selected the smaller side of the profile for the second sweep through the tab.
3. I hide the body/s during selection, prefer to see what I am doing, love the lightbulbs.
I don’t use selection filters, and I don’t often use the long left click either.
So it’s a quirk in Fusion (smarter than we are!)
if it is showing I selected 2 profiles now in the dialogue box, that isn’t how I built the model. Sketches have no history, but Fusion must have joined the two in the background, when you come back to inspect it, it knows I used the big profile first, then divided it.
My story and sticking to it.
Hope that helps...