In the Disavow Links page, all links that you have selected that you wish to remove from your reports will be shown. Here you can see that there are 61 disavowed links.
Assuming you have just created the list of Disavow Links, and you go back to the Dashboard, you'll see that there are 0 links disavowed instead.
This number here is an approximate number of disavowed links that showed up in the Live Links index from your list of Disavow Links.
Because this number is updated once a day, it r zero on the day that you select your Disavow Links.
This number will change, however, when any of the disavowed links show up in the Live Links index from your list of Disavow Links.