Deals submitted after the submission deadline will not be accepted. There is no guarantee that your deal submission will be selected. Amazon retains discretion over deal selection and approval, as well as the right to suspend, terminate or modify the date of a deal.
If Amazon approves and selects a deal, Amazon will determine which days during the event the deal will run on. Minimum quantities on Seller Central do not take into account the increased customer demand and traffic that may be seen during the event. Include the total quantity you can provide as higher quantities may increase the chances your deal is selected.
You will not be able to make adjustments to your deal quantity whilst it is active. It remains your responsibility to verify if any other promotion has been already set by you on your account on approved SKUs within the same week. Amazon is not responsible for multiple promotions for a single SKU.