Question about Roborock S6

Multiple floors? Hello Community/digitec: I have the S6 in use on two floors. The station is on the upper floor. On the first run, it obediently created a map of the OG and then of the UG (I carried it manually to the UG). When I put it back in the OG, it took the last map (UG) and somehow overwrote it, mixing the maps. How do I programme the S6 in the settings so that it automatically understands where it is? Is that possible at all? And if I switch off the map storage and just use it as I please in the OG and UG - is that a disadvantage? E.g. because then he always has to create a map first? Or does that not matter because he always drives along the edges first (even with a saved map). Thank you for your help.