Many factors could make this situation a real possibility.
Alcohol will significantly drop free test as it raises your shbg. Especially since shbg is made in the liver.
Any number of habits can raise shbg can cause this situation and would ultimately lower the free test due to hightend shbg.
But speaking of, this is why the biggest guys in meso preach nutrition, magnesium and the vitamins you get from certain Whole Foods help to lower shbg and thus for, they see big gains.
But to clerify, I feel as if there was a bad batch of test e for sure. I'm not trying to justify that at all. Just simple fun talk about testosterone and the human body is all I'm speaking about.