I was always taught that the kilt belt is NOT to go through the loops on the back of the kilt and that the loops were only meant to hold the sporran strap. As a matter of fact, if memory serves me correctly, this is stated in "So You're Going to Wear the Kilt! " by Charles J. Thompson. I do see others wearing their kilts using the loops to pass their belts through and wonder what the consensus of the forum is.