Noodle, i wouldn't be too worried. Lysteria can form on the lettuce but as you mentioned, it was previously washed. I know what you mean about the food thing but I am sure all will be well. In regards to the roots still being attached, I am sure that most of the dirt on those would have been washed off prior to shipping it to the shop. To be honest, there are so many 'rules' that if we looked at everything we wouldn't eat anything and that would be bad too! Good luck for the next 6 weeks.