Reaction Substructure Matcher node

The Node Description for the Reaction Substructure Matcher node does not document the Substructure Settings panel options - in particular, the Mode.  Please could this be added?  As far as I can work out from experimenting, the 'Standard' mode appears to ignore atom mappings in the query reaction, and the 'DaylightAAM' mode uses them?  Is this correct?

Also, are there any plans for a Reaction Substructure Match Counter node, analogous to the Molecule SS Match counter node?

Thanks

Steve