This glyph (Hb3-7) seems to have aquired a leg similar to the one in Pb5-12:

Here there is a sitting person, and presumably then the leg in Hb3-7 is not a sign of running but of 'seating'.

A similar glyph (as Hb3-7) apperas in 1a6 H:

Why is this one looking at us, but Hb3-7 looking sideways?