I don't think it is a setback. Cats do these things from time to time. Even after 4 years together, sometimes I have the battle from heck...and it was more frequent when they were younger. I think Ally now realized Connor is HTS (Here to stay), and no longe fearful of each other, the Alpha Cat Syndrome is working itself out.

I must agree with others, unless there is blood, let it go. They have to reach an order.