Ah. This problem has nothing to do with your theme, because *themes do not
affect the look or behavior of anything on www.tumblr.com*.
It looks like you're having a problem with the Tumblr's dashboard
interface. This is usually caused by your computer, your browser, or its
You can email support at tumblr dot com for this, or I can try to help. If
you decide to go with the latter, can you tell me what OS (Mac/Windows) and
browser you're using? Also, have you tried disabling all add-ons/extensions?