I have been doing RTW's for a while--the reissue rules still defy me.
1. I reroute--ticket has to be reissued--understandable
2. I change flights-- and carriers--ticket has to be reissued
3, Now I change only dates and ticket has to be reissued

is this what others are experiencing? I seem to have read somewhere that dates can be changed multiple times and ticket does not have to be reissued.