How to use tile layers in ArcGIS Online
Ok, so here's the thing 
I worked with ArcGIS for Desktop 10.3.1 to do some geomorphologic analysis, which resulted in a few raster layers (all in GeoTIFF format). I want to publish them to ArcGIS online, in order to make a Web App for presenting those maps.
I uploaded the GeoTIFF rasters as a Tile Package (Create Map Tile Package function) and used Publish to convert it to a Tile Layer (online).
All good so far. The problem is I can't choose which raster to display in an online map. It only shows me the one which had its check mark on, when I created the Tile Package in ArcGIS for Desktop... I can't choose another one from the list, in order to make it visible (see the picture)
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Am I doing something wrong or is it a known limitation of ArcGIS Online?
I am using an Esri Developer account on Microsoft Edge 38.14393.0.0, Windows 10 Home 64 bit.
Thanks a lot for the help
