In order for the Jehovah's Witnesses' teachings about Jesus being a created being to line up with Scripture, Paul would have had to say (altered text in purple italics)...
Colossians 1:15-17

What I want to know is this: If Jesus was nothing more than an angel, is the Watchtower trying to say that an angel created all things for Himself? I thought all things were created for God? Hmmm.
Actually, what Paul is saying is that BECAUSE Jesus created all things, He has been given the title of Firstborn of Creation. Not because He was created, but because He did the creating. Much like God referred to David as the "firstborn" of the kings of Israel. Not because he was the first king, but because God gave him the supremacy over all other kings.