Feedburner numbers plummeted...HELP!

Help! So I just did a Blogger to WP transfer for a client and followed the instructions here: http://rtcamp.com/tutorials/redirect-feed-url-from-blogger-to-wordpress/

Her number of subscribers was just over 18,000 but now after we did the redirect they have plummeted to about 3,500!!!!!! Have you seen this before? Is there a way to fix it? Will the numbers go back up?

@lexilynstudio If you followed all the instructions correctly then, yes the subscribers count will be back. Just make sure your client had posted 1-2 articles on WordPress (after migration). Thanks.