I think a number of things play in there.

1. Shot one at home, shot two at the gym post workout

2. This is the most I've ever eaten on a regular basis and the first time I've ever gained weight at this speed

3. The detailed blood test and subsequent sit down with a practitioner to figure out what I'm deficient in has likely made a HUGE difference in my ability to metabolize all the food I'm taking in properly

4. This is the highest frequency of weight lifting I've ever done, at 6 times a week.

5. My natural state is skinny, when I put on muscle it really shows, and there likely a bit of a muscle memory thing here given that I've trained in the past relatively consistently.

I wouldn't be discouraged, I would perhaps look into testing for what you're lacking and fill in those gaps.