It still sounds like its going ok to me, but that there is more work to be done by the introduction process. You might need the process to go another couple weeks -- it takes as long as it takes. Face to face is always going to be more stressful, so it would be better if there is zero redirected aggression and minimal or no hissing before you get to that final step.
You can't comfort a very stressed cat -- all you can do is give them a bit of space, so your reaction was perfect.
You can't comfort a very stressed cat -- all you can do is give them a bit of space, so your reaction was perfect.