We call it the Ninja knot too, when Joey's hair was shorter, I found that using the two band method helpful, it also works well if you are using a bow, because it locks the bow in place Here's a link describing it.
Casual Way to Put Dog Bows In. I also think Pet Silk Topknot gel is great for keeping those short hairs out of the eyes, until hair grows longer. Don't be tempted to use human hair products which can be harmful to the eyes. Here's another good link:
Topknots shared by Linda Grimm and Maria Lelinho starring Rocky! Many Thanks!, and a third:
How to make a topknot - illustrated with pictures Dog Bows