I too have experienced this just the way you describe. However, as stated previously, it's not just the VT. I'm using my VT with Tachyon which has been in use for about 8 months now and I still have the problem from time to time. I find that the tighter, i.e., the more wraps that I put into the hitch the worse the problem becomes. So for example, if I use 3 wraps up top Vs. 4, it's better, i.e., causes less twisting. I also found that alternating the overlaps coming down helps Vs. keeping the same one crossing over the top each time. Even with various "preventive" measures I still have problems from time to time and the best cure is simply to get the rope out of the bag and stretched out while climbing. If I'm tending the rope and letting it drop freely it takes the twists out of the line, however, if I do a bunch of short up and downs with perhaps half the rope left in the bag it became a real mess. I feel your pain, because it really frustrated me, however, running a little looser VT seemend to help me a lot.