Hello,
I have been working on a new tool (reactome_cli) but have run into what I think is a bug in the CSV display. See the attached image, the header is displayed twice. The CSV itself does not have the header line duplicated. Is this a know issue? Is there a workaround?
Welcome @Paul_Wolfe
Yes, this is how the display works. The “columns” are labeled for you are a separate display, but what is inside is the actual file. So: the blue bar is for display clarity, then the plain text is your data. These will usually be numbers if there isn’t a header line in your data, or it may be metadata labels from a specific file type such as a bed file.
The topic here discusses with more details, but for a tabular format → Use first row as header - #2 by jennaj
With some tools you’ll be able to input csv and Galaxy will do a conversion to tabular for you at runtime. For more control, or if you get an error, try converting to tabular yourself first (using the pencil icon) then maybe check to make sure the fields are as expected (no blank trailing columns).
Does this help? We can follow up more. 
Thanks for the explanation! I guess the only thing I’d say is that it is bit confusing to the end user. But not a big deal, the display is mostly a convenience feature anyway.
I agree! And we’ve discussed it quite a bit. This is much more useful for other file types, so this is a bit of a compromise solution, including this peek view for everything versus nothing. The cvs really is the most confusing, next to free-column order tabular. But maybe mostly at first.
