andy they would cause the disks to warp as the disk may be running at a angle so feel as if there warped

the part that wears is the actual hub not the carrier as in a bearing kit you will notice that the carrier has a removable bearing surface so when you replace the bearing you replace that surfacem the hub though runs on the bearing and so that gets the wear

remember the brake caliper is on the carrier and the disk on the hub so if the disc runs true on the hub with a DTI gauge then the brakets could possibly be bent as i mentioned before

this is all infomation that ive gathered over the last 2 weeks as ive got brake problems at the moment caused buy a bearing just collapsing with no noise mention at all and its happened 1 year after it failed the MOT last time for wear in the bearings which they fixed

good luck and tell me what you find