There was a duplication issue with the current setup.
I have also introduced "return-ticket-item", where you can decide if you want the players to get the ticket item back when destroying a blockframe.

Blockframes now can drop blocks when they are broke

Small bug when counting island level has been fixed.

Added a blacklist feature, just add what blocks and metadata to the blocklist for it to be denied being put in a blockframe.

Added block-specific limits. You can have a general limit of any number, but you can also have block-specific limits to change that number.

Added chest-pulling. You can allow or deny your players to use the sign ability to pull from connected chests.

Lot of background work, making sure things were deleted properly on island delete/reset.

Added protections against visitors so they can't break the block the sign is attached to, nor the sign itself.

Cleaned up misc. console errors that appeared when restarting server.

Forgot to test in 1.8, right now this is good for 1.9+

Below are the new updates:
- Added support for data value for blocks/items
- Added blacklist

Throwing errors in Minecraft 1.8, quick fix!