Something's wrong, somewhere. In essence, Vr is linked to V2 by the time/speed increase necessary to do the rotation flare in the OEI case. With the 732, target pitch is 12-13 deg which takes around 4-5 seconds with a split ranging from 6-7 kt at low weights to a couple of knots at the high weight end.
By any reasonable definition, Vr must be not greater than V2.
I suspect that your data - or the overspeed correction procedure - has an error somewhere.
Do give me a call via email - I would love to follow this through for my own reasons.