This very think happened to me about an hour ago.
You nay find if you click on the booking that they may not actually have added dogs onto the booking.
Yesterday I was tinkering with my settings in an effort to fill some gaps over the summer. I decided to swap my previous £10 per dog per night for £20 per dog per stay thinking it would be easier.
Booking comes in today for two couples for three nights. No pets booked but in her message she mentions bringing two well-behaved dogs. I thanked her for her booking and asked her to go to her trip and amend the booking by adding the two dogs. She couldn’t work out how to so I added them for her but noticed that instead of what I thought was £20 per dog per stay it only calculated £20 for the two dogs in total. In real terms this means my usual £60 (£10 per dog per night x 2 dogs x 3 nights) dropped to £20 minus fees.
I may go back to my old set up of charging them per dog per night via the Resolution Centre.