What an intriguing property! I took a look at your listing and it is indeed very confusing. You actually have three listings of what appears to be the same property with slightly different names. One listing shows $219 per night 6guests/3bedrooms/6beds, another shows $157 per night 8guests/3bedrooms/8beds, and another shows $157 per night 6guests/3bedrooms/6beds. It may be that people are seeing this as three houses grouped together on the property. Those three listings together would be 20 guests and 20 beds! If they see the photo of a double/queen bed, they will think they can sleep two in a bed.
The first thing you need to do is to clearly differentiate if it is indeed two houses by having clearly different names for the listings and clearly different photos of the interior for each. If the outside has shared common areas, clarify that and show those areas on both listings.
Next, be clear about how many guests and how many beds you have at each property and what the configuration is. From the photos I could see one room with two single beds and one room with a double or queen, couldn't tell, and there was no photo of a third bedroom. On the Airbnb platform, go to your listing, then go to the left sidebar (three horizontal lines, click on it to show the sidebar menu) and select Basics. Then fill in the proper numbers in the boxes. Clarify the type of beds and they will show as cute little icons on your listing, which is very visual and helps guests see what you really have. Do this separately for each house.
Some people think children of a certain age don't count, so if you get an inquiry about it, just let them know how you define it. For example, we don't count infants in our people count because infants usually sleep in a travel crib.
Also, I would recommend you choose a nice frontal photo of yourself for your profile picture, not the photos of the elephants. Just as we like to see recognizable photos of our guests, our guests like to see a recognizable photo of the host. It is also what Airbnb recommends. All the best to you! My brother lives in Cowes, so it was nice to see your photos of the area. The last time I visited Philip Island was over 10 years ago! Guess I'm due for a another trip!