Well, clearly your geocaching.com statistics are correct, since project-gc draws from there.
ganja1447 commented the other day that project-gc was working toward factoring in lab caches for more than just the header. Looks like this has now gone live. and that lab caches are now being calculated like normal caches in the statistics.
Everywhere, that is, except for in the header, since that used to calculate geocaches only and then add lab caches in.
Now that lab caches are being counted with the other geocaches, it seems the last thing needed is to remove the forced add of lab caches so that they aren't being double counted.
If you look elsewhere in your statistics, the total should be accurate. I imagine this double counting will be adjusted soon.
edit: see also discussion here
