12lbs from placebo?

[Curtis212]

Age: 21
Height: 5'11
Weight: 197
Bf: 9%
Training: 5 years
Its my 2nd cycle and im currently running what i assume to be legit Test-e and injectible d-bol from a pharmacy in california. The vial looks very legitmate except for the expiration date is printed on the label. I have read earlier that if the expiration date isnt burned into the vial it could be a fake. I asked my supplier about it and he swears its legit and uses it himself.

My dosing is as follows:
Testosterone Enanthate: 600mg/wk; weeks 1-12
Injectible Dianabol: 25mg/ed; weeks 1-4

So far ive gained 12 lbs of mass in a week and a halfs time. Ive been eating like a horse and comsume around 5,000 calories a day. From what ive heard im supposed to gain a lot of water weight from dbol, but what from what i see all the gains dont seem to be solid. This also kinda throws me off and makes me want to question the gear. Has anyone else experienced this while using this combo?