The way I used to adjust feature lines was to highlight the node I wanted to adjust and then raise or lower that elevation encrementally until I got to a grade that worked.
Now I've noticed that when I highlight a node and hit the button to raise or lower, it forgets which node I had highlighted after the first press. This is a problem because now I either have to click on the node every time, because if I don't it will raise or lower the elevation of the entire feature line. It is a huge pain in the rear.
Hope that makes sense, is it happening to anyone else? Is there a fix? It worked fine in 2011, not sure about 2012.