The witness statement is clear, it was either Wednesday or Thursday BEFORE the football game. If it was me in front of those ladies, I'm quite sure I wouldn't correct them and state, no, it was Monday AFTER the football game. The advantage they have, is they were there.
As far as Ruth goes, well, there was no apparent reason for her to get all upset when Jean confronted her about the Furniture Mart. Why the reaction? Why declare Oswald could not drive? Of course he could drive, you know that, the Murret's know that. Who cares if if he's a crap driver, the fact is he could get behind the wheel and drive.