Good deal bananagirl, I see your sponsor changed her mind as well after thinking about the situation.
This is strictly my take on it, and I would suggest the same to a sponsee.
What was my motive in drinking/eating what I did?
If my motive was to sneak a bit just to walk to the edge, then it might be time to pick up a chip, but if there was no motive behind it, then so be it.
If I honestly thought it was totally alcohol free and found out later it contained alcohol...... well I would not view that as a break in my sobriety, now if I continued to do it I sure would.
It is your sobriety, here is the litmus test for me, if I can look in the mirror and look myself straight in the eye and say I did not purposely bereak my sobriety then I did not break it.
I am glad to see your sponsor is open minded and knows that your sobriety is yours and not hers.