I think you can wait, I have a couple hives I am givng them time to finish off there supers. It sounds like they did OK,but good enough, in contrast some packages will net you 2-3 supers first year. then again depends on area and food sources. you say the lower is light, thats kinda the way it happens, since the super is already full of uncapped honey I would start to feed them pretty darn soon, six weeks to frost. a chick feeder would be fine but I would take an empty super and put it on top, then take a couple small shims of wood and set a quart jar on top with some holes in the lid and let them feed that way. Put the top back on,,, works for me. fill it every couple days. or find something slightly larger . I do this now.
FEED As long as they will take it. once it gets too clold they will stop taking the syrup. let them back fill the deeps. weight should be at least 80lbs per deep.
if you get any honey first year your doing good. Later on when its getting really cold, sugar them, (Mid to late Oct) put a sheet of newspaper on top of the frames, cut a couple slits, little ones then add an empty super, dump a bag of sugar on top of that newspaper,then the top. it will pick up humidity. add insulatiion and on warm days the bees can eat it form the bottom.
If the bees are cleaning the bottom board they are doing just what they are supposed to do. Nice and hygentic.