Two Mistakes

I adore this film, and have for decades. Such a terrific, tight, witty script, along with
superb direction and great performances.

However, on last viewing a few weeks back, I noticed two errors.

When Mr. Dingle is getting acclimated to his room, a Murphy bed falls from the wall. This,
of course, is to indicate that this is where he will sleep, and McCrea will get the other bed.
But WHY would there even BE the other bed before Arthur decides to rent out the room? If
there's a Murphy bed, why buy the other??

Second goof: In the morning, when Arthur is leaving for work, she yells out to Dingle,
"Would care to ride?" Huh???? The night before she told him it was best that they not
be seen leaving together. Secondly, that tiny car could barely hold the four women, let
alone portly Mr. Dingle! And how would she explain that this over-sized, older gentleman
is with her and would "like to ride?"