Every spawn point I place in my server doesn't seem to spawn players, instead players are spawned in random locations like if there weren't even any spawns in the first place. I don't know if I'm missing something or if there is a conflicting addon.
If you want to make some yourself go here: http://lego.brickinstructions.com/en/showallyears (I'd recommend doing the ones from 60's to mid-70's mainly because everything after that began to use complicated bricks or pieces)