Can only use it for 11 code snipets?

Im using this code to add very long code snipets into posts. I added 11 code examples but for some reason it will not let me add any more than 11. Is it not possible to add any more instances of hana code on one website? If it is, what has gone wrong?

You can see what I’m doing at http://dazzlesnap.com

Please let me know asap as the client is in a bit of a hurry.

Thanks!

https://wordpress.org/plugins/hana-code-insert/