yetiscot

There is no movement when they are correctly installed. I would love to see a picture of what they have done , because what they have done sounds far more difficult than putting them on correctly. 
The proper bolts are tapered towards a slot in which the roofbar clamp sits , to locate and hold it steady.
The taper should ensure that the fitting slides automatically into this groove.
If they have used standard bolts with a cylindrical top this will be unsafe.
The bolts are very tight to fix and to remove because they have a liberal amount of thread lock applied to them. They are also a bit awkward to fit, because the are tilted down towards the roof, so you have to be careful that the tool you are using does not slip out or break!