I've uploaded a list and it shows that there is 13K leads, however, on the control panel it is still saying there is 0 leads. I keep refreshing it, but it still shows 0 leads.
Please attach a screen shot of the 'control panel' that doesn't display your newly imported leads. Which filters are you using to display these leads?
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Showing 0 leads here, but when I click on the list, it shows the 13K leads (shown below)
We've never imported leads into an Email program, so I can't compare what you are seeing to my experience, but It seems like it is a bug that the Email program control program doesn't display a Lead count - especially in light that it displays a Blocked count. You may want to open a case with Marketo tech support to research this further.
Was your second screen shot of a list overview from when you clicked the '0' link in the Email program control panel?
FYI. I moved your post to the Products and Support section of the site -- you will get an answer there faster.
Thank you!!