Perhaps I never paid attention before, but yesterday, I did a quick look at my affects to see if I had a disease, and I was shocked to see I've got Pickpocket bonus of 25% (x2), 1H 25% more damage (x2), and Alchemy 25% stronger (x2).
These are based on the rings and necklaces I enchanted. I'm carrying them, but not wearing them.
However, the bonuses are working! Glitch or was it always like this?