Lightest Hydraulic Cylinder (1P2 cylinder) weighs 20 tons?

[WarpPrime]

I'm trying to fix a broken ore transfer vehicle by rearranging parts and attaching two 1P2 Hydraulic Cylinders. One of them is normal, weighing 0.052 tons, but the other weighs 20 for some reason and I am unable to use it. Help!

 

Screenshot for reference: https://imgur.com/a/E9ypCwx

[WarpPrime]

Ok, I solved the problem. Because when a Kerbal is flying, the part mass is unlimited, so I had Karen drop the cylinder while flying. Apparently the cylinder teleported 100 meters away from the ship; fortunately its mass was reset. I was able to recover the cylinder but Karen needs to send a call to the manager later...