It sounds like you do not have any item in your L4 Sub-Market Channel list (or not access to them) therefore the fitlers aren't shown. Add a least one item in your list and you should be able to view your filter.
This won't help with your access issue, but you should really think about combining those filters into one line item for performance reasons. Why? The way Anaplan works is it will retrieve the data for the first filter and then it will re-read the data for the 2nd filter.