If you were doing all right before with your other Gems you might want to check to make sure the button is in good shape by lifting the front of the cap when locked to make sure it is clamping the blade down. Sounds like your push button had a lot of use so it might be worn. A quick fix is a little plastic shim I installed at the back of mine(.015 thousands of a inch from a yogurt lid.) Reference #87 & #148 on this thread.
They are a sharp blade and you might of been applying similar pressure as the Treet blade and scraped some skin.
Have some great GEM shaves!
I'll definitely check the door next time I use it.