Well , you're saying yours is backwards . The problem with what you are saying is that the full movement is limited by a shorter stop machined in the selector's " barrel " area . The short throw , won't feed from the magzine off position is due to a longer stop machined there in that position of the barrel . The center position is machined straight through , with no stop for the bolt lug to hit , allowing the bolt to come out . There really is no way for the rifle to do what you are saying unless the selector is totally mismachined . This is something I've never heard of .
Chris