The rear block wall

Here's the block wall. The final product was 5 blocks high and then stepped to 2 blocks. After I realized where I stepped it from 5 to 2 it was slightly lower and looks as if it's "sagging". It should be easy enough to fix if I can knock out the offending blocks and reseat them. Of course, the contractor noticed the mistake, but didn't care.

The reason the block wall had to be built was the rear north-west corner of the lot was lower and needed to be filled.

For better or worse, a previous laid block wall was unearthed and I decided it wasn't worth the trouble to demolish, so it was "incorporated" into the footing.

 It doesn't seem very wide or deep, but if you dig it out by hand (like me), it's definitely time-consuming and kind of a hassle. What are you gonna do?