(Strip Number 292, Original Publication Date, 27 July 1982)
Panel 1: As our story continues, a Via Rail employee I'll call "Hercules McFuffidge" shows John and Elly where they and the kids will be sleeping; upon showing them 12 and 13 F, Elly tells him that she'd asked for two bedrooms.
Panel 2: He looks at the tickets and tells her that it clearly says 'roomettes' on them.
Panel 3: Goggle-Eyed John blurts out "WHAT??" and then asks her why she didn't make sure and why she didn't check to see what she was doing.
Panel 4: Herc asks to be excused so that John can continue to yell at Elly in private.
Summary: What I myself think happened is that when Elly booked the trip, she'd tried to stretch a buck and gotten confused by the phraseology used to describe the accomodations; since she can't admit to being an inattentive nitwit who's too busy racing around in a blind panic all the time, it'll be on Mike and Lizzie somehow. Their naughtiness made her lose the focus she never had.