Thanks for the info. I also just got this response back from Winexpert
.... Yes, the addition of the f-pack will cause the wine to start with a
higher s.g. and have a higher alcohol content then its profile. It will also
cause the yeast stress – it contains sorbate which controls the yeast
population. The yeast often overcomes this problem with a little extra time.
You need to keep the yeast happy – keep it warm - 74 degrees is nice. Give
the wine a really vigorous stir once today to a froth. Do not rack it until
it reaches 1.010 – it may take longer then the instructions state.
We will give you instructions on sweetening it up at stabilizing so it will
taste as per its profile.