I'm not really sure why your new uploads aren't showing cover thumbnails RH.
I would suggest using ZIP and CBZ files though as cbr files can sometimes cause problems.
I notice your version of #17 is much smaller than Michael Barnes' original RH. Did you shrink them?
I normally suggest when adding fills to leave the original files as-is and uploading the result.
For now I'll leave MB's version up.
Nice looking scans as always RH, great job!