The local paper that Wilma puts the ad in is called The Bedrock Chronical but in the previous show their paperboy Arnold holds a stack of papers called The Bugle and furthermore in the two per they're shown reading is The Rockville Times.
After they crash the wheel chair Barney is shown with his back on the ground and legs up against the wall. Then when Betty talks to him he is laying the other way flat on his back with just his head up against the wall.
In the restaurant Fred's chair disappears from behind him then re-appears after he faints.