Regardless of whether it's unintentional or not, it's still a WBTB! People who get up in the middle of the night for a glass of water and to use the washroom unknowingly do WBTBs, even if they have no idea what LDing is.

Go Cuddy, haha! In that first dream, stabilization might have helped near the end - sometimes muffled hearing can indicate that the dream is ending, and that you're transitioning to using your waking life senses again. Rub your hands together, touch objects, and just keep saying that you're dreaming. In the second dream, sometimes my lucidity goes on-and-off as well, so it's not that uncommon. How did you attempt to make the sky go from night to day - did you try to drag the moon down and therefore the sun would automatically come up? Or, did you look away and look back at the sky, expecting it to be daytime? Both of those techniques can work well, especially if you actually try to visualize the lighting gradually changing from dark to light. Fully believe that the sky will change, as if it's a natural thing.