What is the difference between graphical abstract and graphical table of contents?
If you upload the required image and text, the journal staff will figure it out and it will be fine.


Image:  This is the TIFF or EPS file.
Graphical abstract:  This is the text.
Graphical table of contents:  This appears to be an error.  Perhaps you can upload a file containing both the image and text in this category, but there is no need to do that.