Could be several issues here. Molasses and honey can both take a long time to ferment. Although you had no gravity change over two days, you may still be getting a little fermentation from the honey and molasses. Secondly, it "might" be some sort of infection. Sanitation is key. Bottles, caps, cappers, anything that may come into contact with your brew must be sanitized. I would bet on ongoing fermentation however. Keeping them really cold will help some as well.