Hit space or CTRL+space while dragging?
That was always such a bother in AD, around AD15 or 16 they made it so a bus can be moved and bends added automatically. I forget if that doesn't apply to dragging a single wire, or if that functionality made it into CS at all either.
I have the habit of cutting wires (E, W) before dragging things around. Even when it looks like it should be fine, there's a vertex that sticks out at a stupid angle or something.
Tim