I had a couple of pairs of the older style Redback pads that went at the buckle. I mostly put it down to the outrageous chunkiness of my calves - it's difficult to find straps long enough to encase them properly. I used the 2010 modern style Redback pads all through last season without any problems though. Am currently using some Newbery GT335s that I got on Ebay for £24
I have that issue as well, also i have buy whites a size to large for me to get my thighs into to allow any sort of movement