I think what you're looking at is a err..selling point of the McLeod product. We see a LOT of variation is the scattershields these days. Get the casting number on the case. Merlinn is correct in his comment; however, the SSang Yongs weren't supposed to be sold in N America originally and you see them occasionally. Quality on these units varies widely. My assumption is that when the T5s started drying up, these SY's started finding there way here.
Post the casting number on the main case. I'll pull the case off the shelf and verify your dims. Those measurements were from the centers of the holes?
Im off Thursday and Friday; so I probably wont get to you until Monday; maybe someone here will have an old one and can check while Im out.