Supposedly new driver thinks it's an old driver (Intel AMT HECI)

I have an XPS 8500, running Win7 Home Premium.

I ran the Detect Drivers service on Dell's website, and one of the recommended drivers is Intel AMT HECI Driver, with a release date of March 2, 2013. The driver files in the relevant folder on my PC (C:\Drivers\storage\DWW4Y\Drivers\MEI) are all dated 11/10/2011, so a March 2013 driver would certainly be a newer version.

But when I run the installation file Dell sent me (ME_Intel_W74_A00_Setup-DWW4Y_ZPE.exe), it gives me a message that warns me that the version already installed (which it reports is 8.1.0.1263) is *newer* than the one I'm trying to install.

So it sounds to me like either (1) Dell sent me the wrong installation file, or (2) the installation file mistakenly thinks my original driver is newer.

Anybody know what's going on here?