update
I just added the layer again to the webmap using the complete rest url with the number at the end
and the TIF attachment now shows up.
issues-- all the labeling and symbology that I had set in the MXD are gone and I have to use the POOR choices in the webmap. I don't even see the labels that I supposedly configured.
so
why do I see attachments for one layer and not the others, like the one I just tested? it is the first one in the list of layers.
is there any ESRI documentation regarding the need to add the layer with the full URL?