Right it all displays as you've shown. Hdmis are fine as it's displaying on my TV with each (not using the Roxio, it's fine with Roxio plugged in alone while restarting the PC.
We're on OBS rather than SLOBS now too. SLOBS uses way too much CPU.
The last thing I could possibly think it may be myself, is the cable connecting the Roxio itself to the PC, as we didn't get the original Roxio cable for it and figured out ourselves that it was an A to B USB cable. Is there the possibility I've grabbed the wrong one? That it's too long? I'm attaching an image hopefully! And if that IS the case, recommended cable?
Because beyond everything we've gone through I can't see what else could cause an issue at all.