I believe the prices are according to the size of the room, but then again I have been charged the same rate for their (MUCH) bigger room because of who was at the front desk.
And breakfast was included, but in typical style every time I showed up I was either too early or too late-they would tell me anything to not get me my breakfast.
One time the guy cheerfully told me they were out of breakfasts completely, then handed me a breakfast menu that I had to pay for.
This would qualify as one of those things not worth fighting over. If you check in tell them you do not want breakfast included on your bill, free or not.
There is a very busy restaurant right across the street on the corner of Independencia on the same side as the Hotel Duque De Wellington going north. You can eat there if you don't want to wander off too far to begin your day.