So you want to sort by the last notation in the line, like Mailings and Bazaar?
Here's what I'd do. Using the next column over put the words Mailings or Bazaar, remove the existing Mailings and Bazaar then sort by the new column.
I'm sure there is an Excel guru who could make a fancy macro to get you there too.

Here's what I'd do. Using the next column over put the words Mailings or Bazaar, remove the existing Mailings and Bazaar then sort by the new column.
I'm sure there is an Excel guru who could make a fancy macro to get you there too.