I just made socks on two circs using my Boye interchangeables. I know exactly what you're talking about. That white plastic-y part that's got the teeny lines on it, where the cord becomes bigger as it gets to the metal section, right?
It was frustrating and also made the dreaded laddering worse, because of all the tugging, etc. I'll tell you what I did. When you turn the work to start a new half-round of knitting, don't even bother sliding the stitches up onto the back needle part. Just leave them on the cable portion. This helps in two ways: No need to deal with the annoying join, and the stitches are small enough back there such that when you knit the stitches on the working needle, you get NO LADDERS.
Of course, this doesn't eliminate getting the stitches onto the front/working needle and dealing with the join, but it is half the battle.
For this very reason, I just bought double pointed needles on ebay. I might not like them because they're metal, but it will be interesting to compare the two methods.
Yes folks, even with knitting for 35 years, I've avoided DPNs all this time.!