There seem to be various problems with scripts setting and checking for global /local variables. See my post here.
You can work your way around quite easily. I don't have a modded xbox but if it was on PC, i would have made my own "hoe made " patch. If it is what I think, it is easily fixed.
<{POST_SNAPBACK}>
thanks, that post was full of info, but I am still unclear as to how I can trigger the invitation again. I dont have a previous save to go back to...