Why is the Photoshop plan... 22.99 billed monthly/yr. cost more tha photoshop plus Lightroom plan of

It's a marketing tool.

The photography plan has always been a special discounted offer. It used to be $10 a month, an absolute steal, but the price has recently increased to be a little closer to the standard single-app plans. Still, it is two for the price of one.

Sorry about the errors in my post. I could not find the edit button.