Welcome to Pet Talk. With cats, leave well enough alone. Bailey has found the spot of the Alpha and is trying to claim it for himself. He may or may not win. The outcome only matters to the cats in the house, and it is not always the one who is there first nor the eldest. The staring sounds perfectly normal. That, and I bet they follow the new guy around a lot too. If there is no serious fighting, then just go with the flow. The cats will work it out.
Are you able to post some pictures for us so we can see your kitties?