<human>: Can you give me a shortened version of the text?

Title: Wanting to *double check* my numbers...

So I'm 5'9", M, 30yrs old, ~300lbs fluctuates right now a lot. 

According to the FAQ my BMR is 2607, also my activity is 5 days of the gym: 5min cardio warmups then one section a day (Arms, shoulders, legs, back and chest) for 45min-1hr, ending with 30min of cardio. So I believe this puts me in the moderate activity level with the multiplier of 1.55. 2607x1.55= 4040 to maintain my weight.

I eat according to a paleo/keto lifestyle and I was keeping a goal of about 1600 calories, but very casually in that I haven't been logging my dinner, but I know my fish/chicken/steak + veggies are not bringing me over 4040 calories per day since after lunch I am barely over 1100 or so if I even eat all my snacks in between my breakfast/lunch.

Anyways I have bought a food scale and am going to log correctly, but this could be because of muscle gains, right? Since my calorie calculations are about right, I assume, please correct my math if I'm wrong. Also, my goal is to end at 200 and be "well built" and all too often I see people who have lost all their weight say "I wish I lifted while losing weight so I kept more of my muscle"... I guess I get discouraged when not losing as fast as I have before.

(I should know better this time, but just asking all this to make sure)
<bot>: Are my calorie calculations correct? And could my slight weight gains in between weight losses, in fact, be muscle gains?