Please make sure that the SEPM is updating the 32 bit defs.

Go to SEPM, Admin-->Server-->Show Live update downlaods and check if 32 bit Microdefs are updated or not. If not then follow this:

File system cleanup for 32-bit SESC Virus Definitions:
1. Stop SEPM server service.

2. Go to C:\program files\symantec\symantec endpoint protection manager\Inetpub\content\{C60DC234-65F9-4674-94AE-62158EFCA433}" folder and move all of the subfolders to another place, such as C:\Temp if you want a backup, otherwise delete the sub-folders.
Database cleanup for 32-bit SESC Virus Definitions:

3) Go to C:\Program Files\Common Files\Symantec Shared\SymcData\ and delete the following folders:
sesmipsdef32
sesmipsdef64
sesmvirdef32
sesmvirdef64

4)In the registry, navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\InstalledApps.
Delete these keys
SymcData-sesmipsdef32
SymcData-sesmipsdef64
SymcData-sesmvirdef32
SymcData-sesmvirdef64

5). In the registry, navigate to and delete the following keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\SharedDefs\SymcData-sesmipsdef32
HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\SharedDefs\SymcData-sesmipsdef64
HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\SharedDefs\SymcData-sesmvirdef32
HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\SharedDefs\SymcData-sesmvirdef64

6). Start the SEPM service back up.

7). Run Live update from within the Symantec Endpoint Protection Management console.
This will re-populate the database which in turn will update the moniker folders.