How do you set up limited mob spawners?

[Orameus]

I have looked all over the internet and done a fair bit of experimenting but still can't figure out how to get limited mob spawners to work.

In specific none of my "New Entries" will save. When I am done with one I click "save and quit". When nothing happens I reopen it and find that the entry isn't there anymore. The only things that don't change are the settings I adjust on the main page.

I didn't want to put this with the bugs because I am not sure whether it is that or just something I am not noticing. I can't find anything about this item anywhere and I can't even figure out which mod it comes with. Some help would be much appreciated.

Btw all my spawned in preprogramed spawners and generated dungeon spawners work if that is any help.