She is still a baby, and it actually sounds like she is doing pretty well. A firm schedule is what they need, and when you are busy with the kids, you have answered your question-her schedule does not stay the same. That is probably the reason,her afternoons are erratic and doesn't have a reliable schedule. If you could keep her the best you can scheduled in the afternoons, eventually when she is fully trained- and a little older,she will manage better. Try your best to do that, so this won't become a lifetime habit. If you must leave-is there someone who could take her out for you?