Minecraft world has no endportal

I am playing Minecraft: Console Edition on the Xbox, version 1.8.8 in Survival. The seed for my world is 6881183219423020393.

I got some Eyes of Ender and found where to dig. I dug a 10 by 30 block rectangle down into the ground, then found a structure which I thought was the stronghold. I entered the stronghold and explored it, but there were only five rooms or so. Most importantly, the End Portal was missing.

So then I dug beyond the ends of the rooms, and any place that looked like it was an unfinished dead end, or some resources in the walls. Nothing.

I dug a 20x40 rectangle down into bedrock. Still nothing.
I went back up, and dug around in the areas above the place where the stronghold is. Nothing.
I dug out the entire strong hold. Nothing.

Then I went to creative mode, and blew up layers in all directions. Still nothing. I went to some other corners of the world, and searched for the stronghold again, but I was led back to the same place. I found a crevice at the end of one room. I explored that completely, and found no more strongholds.

Then I went to the MineAtlas site to see if there was information there, but the map they have for my seed doesn't match my map.

I consulted the wiki, and it said that there is only one stronghold per world on the Console Edition.

So... what should I do? I'm not too keen on starting over, or having this ever happen again.

Addendum: I'm reading that it's a world generator error. Okay, how can I tell if I am in a world that has an error?