I think i found a possible problem. In UXM #6, when Magneto attacks washington DC he says "America dies tonight at the age of two hundred and twenty-five" which means they're in 2001, and not 2003 as per the timeline, unless he's just rounding, but he seems more like the EXACT kinda guy to me.
Plus a few pages later he says to Charles "We need to finish a fight we started in the jungle rain almost two years ago..." which is referring to UXM #26 pgs. 13-16 and per the current timeline, that was in 1999, hence 2 years from that is 2001. so i think it's possible that x-men 1-6 are in 2001 and not 2003. Food for thought, or maybe there is something i don't understand here, not sure.
and yeah DIrishB, i meant UIM 5 and not 4, sorry, but thanks for the info.