Well done! Yes, sometimes articles slip through the cracks. I wonder if they would have taken it if you'd removed the question from the title. Sometimes an editor's objection is as simple as that. Some editors make tweaks on titles, others request tweaks, and still others just reject and move on. There's so much going on behind the scenes that you should never assume your writing caused a rejection. Heck, maybe an editor just broke up with his girlfriend and is depressed, you don't know!