This sort of dual tornado occurred one other time, albeit briefly. It began as a 'wedge tornado' which is the reason why it looks like one system on radar.

I have no idea why there are the words "Holy Tornado" on the screen. It didn't look like a tornado from heaven to me.

One might note there is a fair amount of water vapor in the air when these dual tornadoes show up. This one is noted to have a healthy and vibrant forest in the foreground which would 'lend' higher density water vapor to the system. The dual system yesterday is noted to have crops in full chlorophyll in the foreground. Those crops would lend higher water vapor to the system as well. Just thought I'd point that out. It is a botanist 'thing.'