Not sure what else to check but from my relatively short experience (3 installs) with pressfit 30 bb cups: make sure to not over press them in. The park tool comes with bearing cup presses that will press in the rubber dust seal and pinch the bearings when used. I've found it best to use just the flat bases of the headset press (no additional cups) to press in the bb.
Using the cups my bb felt like crud. Using just the headset press, they were butter smooth. I've only got a few rides on the bb though, so no info on longevity of the bb or creaks yet.
Also, to remove the cups you pretty much can destroy them since you have to use the headset remover tool and it can deform and chew up the plastic. Slipping a metal washer in behind the cups before hammering them out helps keep the bb shells reusable.
That's my biggest complaint with PF30 at the moment, the removal almost guarantees replacement.