All PE fares on this route look to "book" into W class, but they have branded fare products where fare basis codes use coach classes and there is a dual inventory check (must be inventory in both W booking class and the underlying coach fare class from fare basis code) similar to DL BE, C+, and domestic F fares. It looks like flight in CTG-BOG direction was credited using coach class from fare basis code (based on credit, would have been L, V, or X) instead of W booking class.