If you're talking about the System Info in Windows, it never shows OC'd frequencies for Intel CPU's, as far as I know, just the stock frequency.
For example, my 2500K is OC'd to 4.5Ghz (as you can see in my Validation below), but System Info still says that it's 3.3Ghz.
OC'ing DID slightly raise my Processor score in WEI though (I forget how much now, since it's been a while since I tested it at stock).
In any case, if CPU-Z says that the CPU is OC'd, it's OC'd. Don't worry about what Windows says because it's not at all important.