I think you will be fine,as long as you aren't getting any of those odors that you mentioned.I started a batch of blueberry this past Feb.,using Cote des Blanc and a similar recipe.I didn't add the juice and I used light raisins.I started @1.080 and ended @.992.It now has very good clarity and the taste is going to be just to my liking.I will rack a third time this week and plan to bottle this fall.The fermentation was very good,with a nice sparkle,and a very fruity smell. This is the third batch of blueberry that I've done with the light raisins and all have done very well,although I used RC212 on the others,as well as on a blueberry melomel which has received excellent reviews.Stay with it and keep us updated.