I’ve seen this and also had one on a print, what is the tower/block printed for. It’s not part of the print.
Because you have activated the support interface with another filament, two filaments require a tower.
You folks are fast. Thanks for the reply, thought that might be why but I’m still learning. Thanks! By the way this wasn’t my print, the guy who did this has a youtube site Functional Print Friday. He does some interesting stuff.