My figures agree with Mach Jump's calculation and the new CG position passes the TLAR test. It has moved forward, because you have added weight forward of the datum.
Is '-2.5' 2.5 forward, or aft of the Datum?
This is why I dislike datums that are not at the nose of the aircraft. It's easy to make a mistake due to sign errors. When preparing to teach W&B at a glider ground school this year, I read that in light helicopters, the datum is often 100" forward of the mast, just to avoid sign problems.
A lot of gliders have the datum at the LE of the wing root, which gives negative arms for most, if not all of the cockpit loads.