Why YSK: The granny knot is the most common reason as to why show laces seem to be undone so easily. It’s caused when the Starting Knot & Finishing Bow don’t “balance” each other. Recognizing this can help you make your shoe knots much more secure.
Edit: (BTW, YSK the website as well. It’s a really good resource for tying and lacing shoes)
Bunny ears aren’t a problem! The resulting knot is the same as a standard shoelace knot. If your shoes are coming untied a lot, you probably are tying granny instead of square. Make sure that if you cross one way on the base crossing (like left over right), you cross the other way for the bunny ears step (like right over left). All the info in the link applies to bunny ears.