harg
There is only one data record per map object for all zoom levels, with the map rendererer deciding what to show at each zoom level. But in addition, Map tiles are cached on your device for different amounts of time depending on how often you use each zoom level in the particular area. In general if you are seeing information at one level, either the tiles will catch up eventually at other levels, or it is not something that map renderer intends you to see at that level.