Any Windows program that is native to x64 Windows 7 (like media player, IE, etc) will actually get x64 updates only - the x64 updates contain the wow64 32bit binaries. The OP will have to be more specific about which x86 updates are being seen - if they're for non-Windows apps (like Office), then that'd be normal. If they're for Windows itself, then that would actually not be normal for an x64 Windows 7 install.