I have finally got a proprer interchange pannier,

after buying this Back Rack II disc a year ago.

only when I've tried to fit it, it seems impossible to ride without hitting it with my heel
Basically the clips of the Interchange handle are such a distance apart that the only position it will fit, even after adjusting the location, is too far forward. And the lower clip won't snap on in a sensible position either.
Seems like a bit of a design flaw to me. Or am I being thick and just missed something? Any experience welcome

