Crossing this way or that cannot improve anything, it might eliminate a problem.
Theory is one thing, are you having any problems? If so, I would find the errant interconnect cable.
My cables have been this way and that, including many parallel for more than 50 years in many locations/setups.
Most cables, even the cheap ones included in the box are problem free, occasionally, you get a bad cable. Disconnect, Switch them one pair at a time, ....
I now twist my speaker cables, neg around pos, takes a bit of extra length to do that. Ran them un-twisted for years, again, parallel, no problem.