From my limited experience - and I've done mine different to most recommendations - it all sounds normal.
I'm actually slightly concerned mine have done so little chasing, but they've lived side by side for five months now and have shared the same areas so maybe it makes a difference.
It is scary though watching a bun you love going through this, even if it is for their own good. I love both mine as I've had Bell eight months and T about five months - don't know how you feel when it's your loved bun with a bun you've not yet got to know and love, if that makes sense.