Noisy rocker question

OK, so I didn't have time to investigate further, but I'm sure I was careful enough to install the shafts correctly. Since I know nothing of the engine build, the idea of not enough lifter preload seems like something to investigate, but my confusion lies not only in the fact that some rockers have very little oiling, but also in the fact that it is nosier now than it was before the new parts. I still say that if the shafts were installed upside down that there would be no oiling to all the rockers. I spent my afternoon and evening at my buddies shop installing a trans in an Olds Alero, and other fun things. Tomorrow after work I will pull the shafts and make sure they are installed correctly. If they are, I will reinstall the old stuff and see what happens from there. I'll post my findings afterwards. Thanks for everyone's input. I appreciate it.