I wasn't sure if I should put this in the mod section or here due to the spoilers...

Okay, so I'm playing with the OOO and Lost Spires mods, just these two and no others. I completed the Lost Spires quest line and got a magic lamp which allows me to summon a special Ethereal Imp. Great! But here's the weird (and very fun) part - I discovered if I went to the Shivering Isles and fast traveled to the Gates of Madness (I've got the keys) summon an Imp, and then immediately fast travel back to the Island door, then fast travel back to the Gates of Madness, the Imp is still there but it's there without a time limit on the summon. Not only this, but I can do it again and get a second, third, fourth, etc...semi-permanent Imps.

I'm currently running around with five of the little buggars flying along behind me. This is a blast! You should see them go after a Gnarl like a swarm of lightening tossing bees! They aren't immortal, so I do have to stop and rest from time to time and occasionally one gets killed (or stuck in between some rocks). They can't enter a city with me, but they can go through dungeon doors and help me explore caves.

I can also get this to work outside of the Shivering Isles.

Now, is this a known glitch (...bug/cheat/whatever)? Or, is it just something to do with my particular game? Can someone else who's running these same mods test this? It doesn't work with regular summons, but I found it does work with the special mutiple animal summons you get from an OOO mod quest.

Whatever it is, I'm sure having a lot of fun with it.

ETA: I'm playing with the Oblivion GoTY edition and am (obviously) on a PC.