Good point here. This is actually how Google sees it and would be 'correct' to some degree (nothing with the module itself ... more with how Google reads the info).

Here is what I mean:

If you look at it from Google's perspective, there were only "2" unique products (by product id / model) ordered yet there were "3" variations of products in all.

So from Google's end, it reads it as two unique products (which is correct) one of which has '2 variations' (but in fact is the same product as the first.)

Does that make sense?