I can't speak for BlockBuilder but i keep a log to see progression. I wouldn't say I have a bad memory. More like I have more important things to remember than what I did in the gym a week ago.
What difference does it make? He is obviously in contest prep in those photos. To get that lean, no matter what one weighs is a feat. Not to mention, if he is 145 in those photos, he isn't a skinny 145. He is a lean 145 with muscle. I can tell from your posts you would find anything to nit pick. If he was on gear and a lean 220, you'd probably call him out for that, if he had a lean powerlifting physique, you'd probably tell him he needs to cut. You won't admit to it, but one can tell by your posts you'd look for something to bring him down.
Insecure how? He was trying to prove a point that was brought up by frank. The point being that people who write stuff down focus more on that then lifting and thus their training suffers. He was proving him wrong. But like most posts, it went over your head, as usual.