I had the the exact same experience.The filter cartridge plug on mine is on really tight. I couldn't get it undone and didn't have a strap wrench handy so I just left it on. The entire filter cartridge was only hand tight on the car. I was able to unscrew it with my hands without much effort. It wasn't too much trouble to use my normal plastic baggie routine to keep things clean so I don't know if I will ever bother with the cartridge drain plug.
Couldn't get the filter housing plug out. The housing itself was only finger tight.