Yeah, inadequate hydration was my first thought also, but all 3 of you? Maybe, if you all operate in a hot environment, have similar diuretic diets, don't drink enough, etc.. but it seems unlikely to account for such a weak response at max doses.
I already requested the batch record so later today I'll verify the calcs if you supply me your bottle number, but I doubt that's the problem either. This is a simple product (1 active only plus the T-Sorb) so a compounding error is exceedingly improbable.
Perhaps you, your boy, and your friend are just non-responders? Maybe from some genetic disposition related to fatty acid processing or electrolyte metabolism? That doesn't feel like a probable explanation either though, and I've never run across a case like this before so I'm stumped.
Also, it's none of my beezwax, but I would be cautious with the pred if it were me (especially if it's strictly a soft tissue injury.) It may alleviate the pain now, yes, but it also promotes catabolism that is contrary to the healing. However, many androgens and adrenal corticometrics demonstrate the ability of antagonize those side-effects when administered concomitantly, without compromising the anti-inflammatory benefit. It may be something to consider, or I may be wasting my breath because gym opas usually know everything already.