Can fully get your frustration,……..computer says no attitude
Another more simple explanation is that, possibly the Check-in person hadn’t a clue on how to attach one PNR to another in order to expadite your request…..
Easier to say No rather than look stupid….
I remember in the old days checking in on a CP flight to YYZ, then a KL flight AMS then an AQ flight to EDI, all with seperate tickets….luggage arrived at EDI !….and that was before barcodes…
Maybe too much technology and not enough customer service…
I’m also baffled by the distribution of cost aspect? Apart from the liability, I would have thought it would be just as cheap to drop a checked bag onto the transfer belt as it is to drop it onto the re-claim belt….