Has anyone who has fitted them both facing towards (or indeed both facing away from) the shock had a look at them recently?
Assuming the bushing (and by bushing, I mean the little hula hoop bit which is either cream coloured plastic or a thin band of metal with a coating on the inside) is supposed to rotate around the mounts (the actual 'offset' drilled part), then the offset bushing kit should find its own position, non?
The more you bounce on the bike, the more the offset mount(s) will want to migrate round the shock bolt and the inside of the bushing until the hole that the bolt goes through is as far away from the direction of the forces compressing the shock as possible. Therefore if you look at the driveside of the bike (and the shock itself is mounted roughly horizontal not vertical), then both mounts should eventually migrate to three o'clock.
Anyone who has seen an improperly tightened eccentric bottom bracket try and move itself to the three o clock position under pedalling should understand what I am getting at: like an EBB you need some way of clamping the offset bushing mounts in place if you want them to stay put in any other position, and I am not sure a single m8 bolt is up to that...