Hey Jeffrey, your guitar sounds so much better that I had to go back to lesson 2 to see if you got yourself a new one. Good job on solving your technical issues.
Catching up is good, but be cautious about going too fast. Each lesson builds upon the previous one and we are dealing with foundational skills here, so you don't want to gloss over any of the material. I am not green to the guitar but I am starting in D01 because I want to repair my foundation and I am have had a tough time with every lesson. Please don't read anything between the lines here because I think you are doing great. Perhaps the best advice is simply to keep reviewing the previous material with the goal of perfecting it as you forge ahead.
Speaking of broken foundations, on my first submission Yucel was good enough to point out the incorrect position of my left thumb, a trait that is obvious in your submissions too. Yucel was more diplomatic than I will be by suggesting that it seems to work for me and is thus perhaps OK. I tried valiantly to fix my left hand but as soon as I concentrated on some other aspect there it was peaking around the neck to see what his brothers were doing. In desperation I stuck a piece of foam tape on the back of my neck. Now any time Thumper starts to stray he is reminded to get back into position. These basic positions are so important to get right from the start.