At ease, soldiers....
It's important to note here that Marvel.com is one of the worst websites ever made for giving news about a particular topic. They are always out of date and giving false info. They never update solicitations. So if it an *old* post on Marvel.com saying that Singer starts in January of '05, I wouldn't give that too much credibility. Especially since when Vaughan's first UXM issue came out he said something to the effect of he'd stay on the book as long as the fans wanted him.
The Singer stuff was happening around the same time as the Mack reports started coming out. It sounds to me like it was a huge mess and nobody really knew what was going on, and it's just now getting sorted out.