Wrong contact total - Soho Campaigns

Wrong contact total - Soho Campaigns

Hello, 

When I do an export of all my contacts, it adds up to 2367 (2345 are on a list + 22 not on a list) but when I check on the dashboard, its shows 3641. Why is this difference? 
It's a problem because I have a 5000 contacts plan and if already 1200+ contacts are taken by ghost contacts, then I can't import all the contacts I planned to... 

thanks for your help.