Sorry, but we can't exactly fix issues causes by Mojangs chunkloading algorythms.
I know and totally understand. That is why I think the system should be changed from basic to more of a idk how to put it.. I guess not relying on the chunks and button functions but maybe offering more of a third party interface to it.. I am not a programmer so I really suck at this part but like some mods that have built in commands and interfaces and such. I mean like I seen lots of mods/plugins creating stupid teleport system with blocks in a certian shape. Stores the info into a text file and boom thats it. Yeah yours is more complex you gotta update I guess the damage on the power systems but since that is on the chunk your already on it should not be too bad.
Like I said in SMP We consider this our end game. Yeah Mojangs chunkloading blows even more on SMP. But there must be other ways of doing a teleport system.