I'm a new beek that installed my first package in a TBH last Monday. At first there was plenty of action around the hive with bees coming and going. This morning, I noticed very little activity around the hive. I looked in on them through the screened bottom and noticed many dead bees on the screen bottom. They have started building one comb, which is about 4 inches long. Should I be concerned with this hive. For some reason I think there should be more comb drawn and more activity outside the comb. Feeding a 1:1 solution with an essential oils blend added. Current weather conditions in Fayetteville, NC 74 degrees, Sunny, wind: calm