Quito isn't considered an "ocean crossing" but you should be getting international pay for the trip. Did you check your pay statement to see if it's there?

“International operation” means a flight segment to or from an airport, or between airports, located outside the contiguous 48 states of the United States. Exception: A flight segment to or from an airport located in Canada or Alaska will not be considered an international operation.

“International pay” means an hourly pay premium paid to a pilot for flight time flown in an international operation.

I think the reason the company wanted to move the Ocean Crossing line further south was that flights with an Ocean Crossing cannot be part of a domestic category (ie: 73N) so they would have to make a separate, international category of 737 pilots.

Also, in the PWA an Ocean Crossing has more rest requirements after the flight when you get back to base:

For purposes of line construction only, a pilot will be scheduled for a break-in-duty at base of at least:
a. 11 hours following a duty period that does not include an ocean crossing.
b. 18 hours following a duty period that includes an ocean crossing (subject to Section 23 M. 8.).