Even though Ashley was shown as being the older girl, the actress playing her, Leigh Ann Orsi, is 2 years younger than the actress playing Beth, Anndi McAfee.
The title is from the phrase "too many cooks spoil the broth."
This episode is unique as it is a show, within a show within a show. You have the main show which is Home Improvement, then within that is Tool Time and as Cooking with Irma is part of Tool Time universe, its technically a show within Tool Time, so 3 shows all in one.