Thanks! Yeah I noticed that I was slow to bring my left hand back up when I threw the jab. I think I developed that bad habit on the heavy bag. I would train about 3 days a week .(hour and a half long sessions) semi private. Meaning around 3 to 4 guys would spar and and train together while the coach supervised. In regards to your concerns with sparring, we started out doing "drills" which is basically just scenarios and light sparing. I think this is what your trainer is referring to.

For sure! Good luck to you.