can’t add logo to theme sometimes

Hello –

I am using Illustratr for several blogs. On some of my installs, the option to add a logo image is not available while on others it is available. I’ve tried re-installing the theme several different ways including manually via FTP, disabling plugins, deleting cache, etc.
On some installs I simply do not have the option of adding a logo! I’m stumped.

I have a screenshot of the working and non-working menus here:
https://www.andrewautendrawing.com/logo_issue.jpg

THANKS

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