Two listings of same property by slightly different name.

Hello,

I notice that on booking.com same hotel is listed twice with a slightly different name. The hotel owner confirmed it when asked. I booked a room in say Hotel A and I later also found Hotel B with same photos and location. So A & B are listed simultaneously on the platform and there’s no much difference in pricing also.

So how do they (Either property or Booking.com) ensure that there's no overbooking because of 2 simultaneous listings?

The hotel owner has given me assurance that my booking is confirmed.

Thanks..