I did say in my post that you had already said that none of the configs had been changed. I'm asking that you check in case they were set to not give broken spawners when you downloaded the pack.
I do also want to say that if we can get broken spawners to make powered spawners then the server will likely have less torcherinos. I saw last night that Torcherino crafting had been disabled. However, admins/mods were not going around saying that torcherinos were banned, please take them up. There was no server message broadcasting every now and then. There has been no KookyKraft forum post on the matter, informing players of the policy. This morning the subject of torcherinos came up in chat when someone asked if torcherinos could be banned. The admin clarified that they are and said please take them down before admins do. So, while I was with the helpful Javatech before we again were trying out stuff like does TNT have to be 2 blocks away etc. Broken spawners dropped for him but not for me, whatever we did. He let me keep one of the broken spawners, so I have just made a zombie pigman powered spawner and taken down the vanilla zombie pigman spawner and the 4 torcherinos that were on it. If you are worried about torcherinos possibly causing server load, then various players are likely to be running vanilla spawners converted to whatever mob they want and making them spawn at a rate suitable to modded with torcerhinos.
Javatech did suggest that he could try to make a custom recipe to make broken spawners, with say 1 spawner shard and some other materials. If that could resolve it, then cool. I'm also curious if some higher setting in the server software affects this. It is still a mystery why only admins can place blocks including crystals to spawn the dragon, at the exit portal at the End. When admins helpfully summoned the dragon the other night, players could not damage the ender crystals on the obsidian obelisks. Players can place and break blocks there, but still we couldn't damage the crystals. Could some setting in server software, giving some permissions be affecting the issues in the End and the broken spawners?