You bloat on deca because of the stimulation of aldosterone production. Tren does not stimulate aldosterone production, it inhibits it.
Unless you made the stuff yourself from cattle pellets, you can't be sure it's actually tren. People sell all kinds of garbage and call it tren. Heck they might have even sold you poorly converted Test Prop where they hadn't filtered out the estradiol well.
If a substance does something completely contrary to what it is supposed to do, then probability states it isn't the substance you think it is.