Frank, if that is your experience then your labs you use are ****. I know this stuff happens, but with a good source and a good supplier the deviation from batch to batch should be extremely small. My guy that I use as well as my close friends is always spot on. Our labs come out nearly identical every time with respect to the dose we are using. I know we can't test all the compounds, but if the test is consistent, it is likely his other stuff is too. I have had zero complaints since I started using him. However, I have dealt with quite a few labs that have been very spotty so just keep looking and you'll find a good one.
Joe, an attitude like you have right now will get you far in this game. This kind of stuff gets really frustrating to guys like Rodja and I (no offense), but if you can sit there and take it like a champ (and you are doing just that) you will learn a lot. We won't spoon feed you everything, but if you do your research and you come back with questions that have showed you're doing your homework, I will have no problem answering questions and I'm sure Rodja feels the same.