Enhance garden wall without drilling (cladding)

this is how it looked last year.

Uh, the garage wall is what is red in the first picture? - ouch ...

What I don't understand is why he built the foundation in steps and then the stones again on top?

Apparently he confuses "foundation" with "executing the lowest 'row of stones' as a concrete beam".

Yes, it's supposed to be an L-wall,

Well, then read a bit in this thread: - we had a similar case last summer.

Sorry for digging up this old post, but I would be interested to know if the wall is still standing. The foundation seems to begin only from the top edge of the ground and the wall is then backfilled.