Interesting post. I'll take a stab at it hoping some of the more well read members will add to it.
First, I'm not surprised that your DHT levels didn't rise because Masteron is a DHT derivative unlike Proviron which is actual DHT (the chemical alteration which is something like 2-methylation makes Masteron more active in muscle tissue than straight DHT) It's like Dbol and Testosterone. Dbol is a testosterone derivative but taking Dbol won't make your Test levels rise. Actually it should make it significantly lower since your body suppresses and eventually shuts down it's own production, which brings me to my next point.
The surprise here is that if you did in fact have legit gear your testosterone levels should not have remained the same unless you were using HCG or HMG to keep your levels elevated. I'm assuming this was a Masteron only cycle or at least a NO-TEST cycle because if you were taking any appreciable dose of Test you would have expected your levels to rise.
As to there being no "real" Masteron this is probably a misunderstanding by people because the original Belgian made Syntax(or something like that) is no longer produced and 99.9 percent of the Masteron comes from UGL's. The only Human Grade Masteron I know of comes from a pharmaceutical company in Thailand(I won't name it because even though it's HG some of the mods might not know it and decide to delete the whole post). Anyway, it comes in pretty little amps and costs more than Primo. As to the UGL Masteron most of us use, I'm sure it wasn't that difficult to find the chemical structure of a compound no longer under patent and make powder. If it was some CNS drug that did what Masteron does-Strength, Aggression, Increased Libido, Intense Erections, & Muscle Hardening that would be awesome. You'd get crazy benefits without messing with your bodies own HPTA. But I'm pretty sure it isn't that at all. I've never heard of a CNS stim that could do any of those things except increase libido and aggression.
As to the estrogen-again no surprise. Masteron doesn't lower estrogen directly. It inhibits the aromatase enzyme so when you use aromatizing steroids like test, eq, or d-bol it competes with the estrogen for binding sites thereby lowering the conversion rate.