Interesting, but fortunately I cannot relate. I use what I use and have no issues. Well, no bodybuilding issues that is. 
You might want to examine your diet. Although not necessarily your problem, bodybuilders do tend to be excessive (for lack of a better term) and if someone downs a quart of milk and 40-50 grams of protein powder prior to workout (an example), I can understand how tossing a dose of some N.O. supplement on top would cause unpredictable results.

You might want to examine your diet. Although not necessarily your problem, bodybuilders do tend to be excessive (for lack of a better term) and if someone downs a quart of milk and 40-50 grams of protein powder prior to workout (an example), I can understand how tossing a dose of some N.O. supplement on top would cause unpredictable results.