I have booked flights from LATAM and found my Itinerary shown

Cabin: Economy - H
Fare: XEELE10F

I think my booking class should be H.
But when I credited my miles into my Alaska mileage plan, I only receives 50% of miles, and so I guess the system determined that my booking class is X.

When I use the "Ticket Details" page, under the tag "Cabin" it no longer shows "Economy - H" but only shows "Economy" and Fare "XEELE10F"

When crediting the miles, should the booking class be identified by the letter under the Cabin of the itinerary (in my case, H), or the first letter of the fare code (in my case, X)?