the layers are variatons on a theme--multiple demographic views of census data, in a single online map (end users turns layers on and off as needed). Is there a limitation on the number of layers one can put in an ArcGIS Online map? The thing I'm working with now would have 26 layers but it looks as if I am colliding with a limitation--the tracts layer I just created and published won't add correctly to my map, leaving me to wonder if I have not reached a limit.