I've read her explanation over and over, and it makes perfect sense IF the record date determines which issued shares are dividend eligible and new shares are issued after the record date.

For example, if i purchase 100 shares July 28th, which are dividend eligible, and then purchase 100 NEWLY issued shares August 1st, then according to Janice only the first 100 shares are dividend eligible with a record date of July 30th. The ex-dividend date then determines who gets that dividend on the first 100 shares if i sell them prior to the ex-dividend date.

Now, I've not seen that definition of record date anywhere. However, her explanation makes sense if her definition is correct.