John Rumm wrote:

Are you sure its not the porch that is sinking and pulling the wall with
it?

I don't think so. First off, the wall isn't sinking - there's no
movement at ground level. It's bulging out, greatest bulge at
the centre of the wall. Second, I don't believe the porch walls
are tied in to the bulging wall - it appears to have just been
built there, in contact with but not attached to the wall.

--
Grunff