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.