I'm engineering some plasma accies at Bill's place. I was already at level 5 with Bill before I started on the plasma accies so just needed to get through the 1st 4 levels of Efficient Plasma Acc before I could get my level 5's. Anyway I notice that after I get the level 4's out of the way and do my 1st level 5 - there is a progress bar at the bottom (see the attached pic). Why? Or am I still at level 4 or something?