Sounds to me like you've got a dud rod. It's not a problem limited to just Veritas rods tho. But nothing a wrap or two of electrical tape over the joint can't fix. It'll stop the sections from twisting and is easily removed. Cheap quick fix. The other way is to heat shrink your butt section... but that's not as simple as it sounds. Correct heating is critical. Stick with the tape option.