Nether Portals lit in versions < 1.7 will become unlit in 1.8

After updating my server I have found that majority of the Nether portals in the world have been deactivated for some odd reason. After lighting them all up again I went to go through and they would bring me to a random portal throughout the server. Before all the portals were linked to bring you to specific spots, but now it seems the game is just choosing a random portal for you to come out at.