Originally Posted by
JAXBA
Yes, that sounds about right. And as long as you're not changing the routing (including creating/taking away a stopover), there shouldn't be any additional collection, just a revalidation or an even exchange.
^
Did you used to do the special oneworld fares (RTW/Visit-a-continent/etc) when you worked in JAX? We have a lot of problems here trying to figure out exactly why some ticketing/validating carriers are charging different fees for identical itineraries, and how that can be avoided.