@Rhonda301
We have a similar situation and this kinda drives us crazy too. 2 of our listings have 3 bedrooms, and we often get bookings for 2 people, who then use 2 bedrooms. this of course increases your turnover time, the laundry time, and general costs.
Solution:
for our guest suite in our main house we have a listing that is just for 1 room, 1 bathroom (we were also finding people who occupied just the one bedroom were using 2 bathrooms) and priced it low, with an explanation of the situation. One room, one bathroom, and of course the lounge and dining space as normal. Then we have a normal listing, which is priced higher, and if people want to use 2 rooms, so be it, we have it priced $40 higher.
We can't really do this so easily in the cottage so i nudged the price up a bit, which is bad for couples who do share a room, but we've found over 50% of our 2 people bookings use 2 rooms, so we have to price for that situation.