This is the problem, i put down a monster spawner and i got it to work, then when i used a spawn egg on it, it stopped working - i changed it to an ocelot spawner if that has anything to do with it. What are all the requirements for a spawner to work, and i did type /plot toggle mobs.

Is the ocelot spawner on? Grass? Dirt? Stone?

I believe, or is it only pigs, that is has to spawn on Grass. Im sure many people might offer you one for free like Miner did to me.

Mob spawning has been reduced 90% due to too many monsters spawning at a time therefore causing lag and other problems. This is probably the main issue here if all variables are right. Perhaps you could show me your spawner and I can make sure it isn't another reason as to why it is not spawning correctly.

I talked to matt (he is in my town) and he placed the spawner too low in the ground so I was right and the problem was resolved.