af123 can obviously answer this more fully than I can, but, there is currently no package in the package list called Multiple, if you search through the entire text in the package list you will find :-
libmpc - 0.8.2 - multiple precision complex floating-point library
libmpfr - 3.0.0 - C library for multiple-precision floating-point computations with correct rounding.
These are the only two occurrences of the word Multiple, both in the description rather than the package name. This will no doubt turn out to just what af123 said it is i.e. a bug. It is very unlikely a trojan attack would announce it's presence to the user and unless you have forwarded ports on your router, it is also fairly unlikely anything could gain access to your Humax anyway
The Remote Scheduler can't gain access to your Humax, Your Humax gains access to the Remote Scheduler instead, the RS would not be able to get through your Router