Other beekeepers in your Fort Worth area, like @Martydallas use two brood boxes, I think. Do you belong to a local bee club? Do you have a beekeeping mentor?
I assume you are using a “frame feeder”. I would definitely remove it if you have a nectar flow, and put normal frames in that place. What do your local beekeepers say about current nectar availability? If there is lots, you don’t need to feed.
Photos would help. Bees make “play cups” all the time. They may not have a queen in them. This article might help you to decide whether to worry or not:
http://www.wbka.com/wp-content/uploads/2015/04/wbka-booklet-english-PDF.pdf
They might, but did you pre-treat the plastic Flow frames with wax? Lots of people on this forum have found that very helpful. Plastic is not natural for bees, a bit of wax on it makes it smell of home.