I certainly hope they did not use dimensions/ spacing from a gasket that may have been wrong.

Here's a good test to see if a pair of intake gaskets are symmetrical, as they should be in this application. Place them back side to back side and try to line up the ports. Also notice any variances in bolt hole locations.

Ours match up exact with only a very slight variance in hole location. I can't tell you how many heads I measured for bolt hole locations and all were different to some degree so I had to "settle" on a figure. Still, the bolts will go in with plenty of room to spare if the gasket needs to be shifted for any reason.