spinning valves? Options

[silver2.0]

I have a question for you guys. It's a bug question, but the same principles should apply here.

My father built a type 1, with a aluminum block, empi aluminum heads, mahle pistons/cylinders, scat crank, a mild cam, stock lifters, scat chromoly push rods, and stock rockers. It has oversize stainless valves (not sure the size), with 911 style adjusters. All the other items are german vw.

The motor ran great from the get-go, smooth lots of power, yada yada. After about 500 miles he decided to check the valves, and found that one of his lifters had come half off- one of the halves was sitting in the bottom of the head area, the other half was hanging on for dear life. On the same head, but a differernt rocker he had one of the wavy springs that go on the rocker assembly break in half. This made things bounce around, and smashed the valve stem all to hell.

We replaced the offending parts, including the valves, and I noticed that the adjusting screws do not line up exactly with the stem. According to the guy that sold him the head, that is the way it's supposed to be, because that way it spins the valve, and even's the wear, much like they do with lifters on many (most?) cars. Is he blowing smoke up my ass? Or is this for real? Any input would be greatly appreciated. We just want to know what the hell happend, and that made me think twice.

Thanks guys!!

Tony