I have to respectively disagree here.
In my experience, a "roll away" (RA) call has been conflated with a "roll away with a half sashay" (RAHS) for many dancers (and callers) - but the moves are distinct and can have choreographic significance. What I think has happened is that callers are using abbreviated calls of something like "roll" for the RAHS situation (which is more common) and that has colored the interpretation.
In my understanding, the two calls are like this (the "|" symbol denoting the boundary between adjacent hands-four):
"Gents Roll (Away) the Ladies" (Ladies only change position):
Starting position G0 L1|G1 L2|G2 L3
Ending position G0 L2|G1 L3|G2 L4
"Gents Roll (Away) the Ladies with a Half Sashay" (Ladies and Gents swap position):
Starting position G0 L1|G1 L2|G2 L3
Ending position L1 G0|L2 G1|L3 G2
Of course, this can be also done in other configurations like circles and boxes.