I don't know why this site splits up the map linework and text into separate maps, there is no need for that.

Anyway I am trying to upload the text portion (layer 2) of Dranik Sewers C, but the site tells me it thinks my map is grid lines and rejects it. It's not grids, it's text labels. How do I work around this bug? Do I have to combine my text labels with the existing linework into one map before uploading?