[Plugin: Tweetbacks] Only have Shorturls for 2 Posts

When I first installed Tweetbacks I immediately received tweetbacks on two posts I have. There are several other posts that should have been found but haven’t. When I look into the wp_postsmeta table there are only shorturls for those two posts.

What triggers the creation of the shorturls for the rest of the posts? I believe wp-cron is functioning properly since it is being used for db backups, future posts, etc.

Is there a way I can initiate this manually to test?

Thanks!