What happens:
The command "Use Item" remains active even after the release of the ctrl+click command. So torches keep getting placed, and upon selection of other items, they will get used too.

Steps to reproduce:

• Set "Button 2" (ctrl+click) as "Use Item", in options > controls;
• Place a torch. Release ctrl+click, and then move around. Torches will keep getting placed, as every selected item will get used.

Temporary fix: Open the pause screen, and close it.