We've talked about your Category Development situation as being similar to a solar system ... you have a Star, you have Planets that rotate around the Star, you have Moons that rotate around Planets, you have Asteroid Belts (broken categories), and you have Comets that infrequently interact with your solar system (i.e. Gifts at Christmas).
In other words, your business is interconnected.
And when you fail in one category, you impact other categories.
If your Star category struggles, the struggles spill over into all other categories.
If a Planet category struggles, the Moons will struggle.
If a Comet category struggles? Meh.
But make no mistake. Your business is interconnected, and you are doing things that greatly help or hurt other categories.