When installing Total Commander with the combined 32/64-bit installer only the 64-bit version is patched by PMP. The combined version is replaced by the 64-bit version but the 32-bit binaries are left behindf in the old version. I have checked both the 32 and 64 bit versions in PMP Publisher.
My suggestion is that you add a third product (Total Commander 32/64-bit combined version) as a product in PMP, that detects when the combined installer has been used and then updates both 32 and 64 bit version using the new version of the combined installer.
Good News! Total Commander Combined has been added to the catalog as of yesterday - https://patchmypc.com/catalog-release-history/