In Floor Heating Company

am i paying two gas bills?
I live in a duplex, and i went into the basement for the first time last nite. There was one water tank( the landlord pays the water NOT the gas) and each tenant has a gas tank or hot water tank( not sure which). I live on the secodn floor, and the tank labeled second floor had an unlit pilot. The tank labeled forst floor has a lit pilot, but I never had a problem with not having hot water or heat or cooking gas. My concern is why do I have hot water and heat and my pilot is not lit? I pay a gas bill every month. I live by myself and my bill is on average 60 dollars. This month it is 200 dollars, and last month it was 129 dollars. Am I paying the tenant on the first floor’s bill too? Or is there a way that i could be paying just to heat her water, and she is paying her own heating and cooking gas? I am very confused about this, and the gas company could not help me. So please help.
How many meters are there. If there is only one meter, then there is only one bill. You need to talk to your landlord to figure this out.
Assembly hot water ondol system (Korean floor heating system)