I just think it could possibly mean that either your estradiol levels need reigning in perhaps because your test is dosed a bit high or you could have used an aromatase inhibitor to manage the gyno formation such as aromasin/arimidex/letrozole while the symptoms were prevalent. Masteron, especially when used in a 1:1 ratio to test, can act similarly to an AI by reducing the conversion of test to oestrogen & estradiol, so what were your dosages for these compounds?
More simply, if it was the case that you had an imbalance of oestrogen to testosterone, then that is largely manageable through a number of ways such as: keeping body fat% levels lower and not going crazy with cal surplus or getting fat while on gear, as well as injection frequency (more frequent administration can help limit large fluctuations in serum concentrations), dosage (could lower your dose), or making use of diindolylmethane to control mild symptoms or of course employing the use of an AI or other compounds to work synergistically to reduce oestrogen conversion.