Thanks for the heads up! After reading this thread I called home and we had three jars in the cabinet that matched those numbers. One had just been finished.
She then told me our 1 year old boy, who eats peanut butter sandwiches daily, has been lying around all morning with a bad case of diarrhea. I hope it's a coincidence, I've had salmonella poisoning before and it's brutal!
Hmm. Stayed home today b/c of stomache cramps and the like....have a 2111 jar. This explains everything.