I have a layer that has been symbolized in an ArcDesktop project. The project was saved and Shared As --> Publish Service up to our ArcGIS Online account. All layers and their symbology have uploaded flawlessly up to this point. However, this particular layer does not. The data is there and if you know where one of the points is located and click on it, a pop up window with the correct data appears. The symbology shows up in the Content bar on the left of the web map interface just fine.
My first attempt was to upload the project with all layers. The first 4 layers showed symbology correctly but the remaining 11 layers that all have the same symbology (which is different from the first 4 layers) are the ones not showing. (link to web map: http://arcg.is/1S5iWtg)
Several attempts after that were to upload in various ways that would keep the symbology. Including, uploading smaller groups, uploading individual layers at a time, smaller number of natural breaks (from 7 to 4), using more simplistic symbols, none of which worked. While in ArcGIS Online, if I try to change the symbols, as soon as I click on the Change Style icon, all the points then appear as small black dots (which was not the specified symbology).
Here is the example of the web map with just one of the layers uploaded that are not showing up. (link to web map: http://arcg.is/1S5ltDE)