Why would you do this to spacers?

[Dembflyr]

Back in December, I bought a used set of spacers from a forum member and when I got them I noticed that they didn't look like the pictures on the H&R website. That didn't worry me too much as I know sometimes the picture doesn't always go with the particular part.
I checked the part number, 3065662, and found it to be the correct one for the Z and for a 15mm spacer.

fast forward to last week when I installed them. I got a vibration at 65mph and also at about 78mph. It is very slight but its there.
I specifically got the H&R because of the "hub-centric" ring. I should have known by looking at them that something wasn't right but I have never installed spacers before.

I have since called H&R to verify that they have never made model # 3065662 with out the ring and they said no.

So here is a picture of what I have. Now that I have verified what they are supposed to look like it begs the question.... Why would you machine the ring off??


Here is the stamping on the side that shows that they are in fact 3065662


So I guess I am in the market for some new 15mm spacers for the front.

If anyone has just the spacers I'll buy them.