Interesting, why does this happen especially so with this model of keyboard? Yeah I suppose there can be a little variance between lots of switches, but generally they should be uniform. I was under the impression that there was movement in the switch mount. I haven't heard anybody else way that these wobble, other than Choc Mini owners.
If it is the top half of the switch that is mobile, then that means that this is a wobbly switch. In which case I may not want to buy this. I really have to get my hands on a switch tester or sample.