Presently if you're at the stat cap of 225 and you have one stat marked up and one down, you will actually lower the "down" stat to 24. For example, imagine I have: 100 STR (up) 50 DEX (up) 75 INT (down) ...and I leave a Snooping macro on all night. I will end up with: 100 STR 100 DEX 24 INT Not a huge deal, but it's happened consistently to my characters and it's a little wacky.
happened to me, too ... quite funny, I even had a situation where the stats where 100/98/26 and a little later I had 100/99/24. So the last stat lost a point even before my stats maxed out.
I suspect this is due to rounding. If you really want to takes steps to avoid this, add a couple lines to your macro that pauses for 10 hours on the system message of "100".