Hi,
Service Pack Levels of OS's (on the main page) should be separated by whether they are 32 bit or 64 bit, since there are different service pack levels that are current for each.
It's hard to get an accurate idea of where you stand in terms of workstation/desktop patching without this being the case if you have a mix of 64-bit/32-bit machines. This is especially true for XP/XP64.
-Dave
