Tim
Welcome to the forum, you might want to have a look at the following FAQ which explains where everything is
Welcome to Benefits and Work I'm afraid it is not, entry to the Support Group is based on the claimant meeting one or more of the SG Descriptors, once one is met it is generally accepted that those assessing them do not need to investigate further.
PIP is purely points based and the Mobility component is separate from the Daily living one, I suspect that they have to go through all of the DL activities to get to the Mobility ones.
Gordon