I'm not sure I think I understand what you thought you said. Or something. Are you getting the intended 3x or 4x pattern on both sides? Or something? Be aware that the holes in the hub are not directly adjacent from one flange to the other. Get one flange's heads-out spokes laced up, then note the offset of the other flange's holes to the first. Of course, if you don't start right you can end up with the valve hole between spokes that aren't divergent.

Addendum: Do not take it to a shop. Many shops wouldn't touch it anyway. Go to Sheldon Brown and follow the instructions. It is easy and quite rewarding.

I'm not sure I understand your skip-pattern description. You have a choice of whether the head-out spokes are leading or trailing or whether both flanges are the same. (Various builders like one way or another. Jobst Brandt had a reasonable argument for one way but in the end argued that it didn't make much difference.) Anyway, if you do all the head-out spokes first and both flanges have them either all leading or all trailing then there is no cross-over to be done until you start with the head-in spokes.