What would cause this?

After setting my multiplier to 13x and leaving my FSB at 133, when I restart, it shows my CPU as Athlon XP 2000+ and my multiplier at 12.5x, and I verified that with CPUID once windows was loaded. Restarted again and went into BIOS and it shows my multiplier as 13x there, as I originally set it. So, why is it posting at 12.5x instead of 13x?

For some reason I do not know why certain motherboard-cpu combinations do that.
Some when you set them to 12.5 they run at 13 others when set at 13 run at 12.5.

So, nothing is wrong?

No its common. If you get all the other multipliers ok then its not your unlock job.

Also, sometimes when I restart, it'll revert back to a 133FSB and the 11.5 multiplier. Is this normal?