@Jo_Ian0 Your guests are correct- you have listed incorrectly and you'll need to let them use both bedrooms, as it is your error, or risk a bad review.
You need to have 2 separate listings, one for each bedroom. You only show that bedroom (and the bathroom if it isn't shared) and the common spaces on each listings photo gallery and price for that room only.
You can also have a 3rd listing for both bedrooms, with a price for that, in case someone wants to book both rooms. You then have to link the calendars, so if someone books both rooms, the single room listings become unavailable, and vice versa- if one or 2 bedrooms are rented separately, the 2 room option will show as unavailable.
A lot of new hosts with multiple rooms for rent or small hotels make this mistake when they first list, you aren't alone. But you aren't new hosts, so I'm really surprised this hasn't come up before. I guess your past guests have read and understood how you described the pricing and these guests didn't.
Just be glad you didn't list an 8 room hotel in one listing, so someone could book for 16 people for the price of one room 🙂