Stone Retaining Wall

Some parts in this lot where we are making the new garden are high specially on the north side while some are low in other areas. The left side has a gentle slope but we still have to make a low terrace on this side to control soil erosion. The right side is flat while the middle part is low. The south side which is lower and this is where the rain water runs down naturally was eroded during the typhoon. The retaining wall on this south side was 10 feet high. I think that it would be best if we split this retaining wall into two terraces when the time comes for us to do the repairs. Having a two split level terraces should help to reduce the weight of the soil especially when it gets wet during the rainy season. Hopefully, this will correct the problem. Surprisingly, the other half of this south wall, did not cave in. Maybe because it is sitting on a big boulder whereas the other half that caved in was sitting on hard soil. There was a 4-feet wide 3-feet high hard soil at the bottom where it caved in. However, the neighbor who lives on this south side has taken out the 4-feet wide space at the bottom. This portion where it caved in is not actually on his property but rather it is on another neighbor's property but for some reason, he encroached and built a small shack on this side where it caved in. By taking out the soil at the bottom of the retaining wall, I think that this has contributed to the cause of the erosion of the stone retaining wall.  Anyway, we will have to fix and repair this south retaining wall as soon as we could get some new stones to replace the ones that caved in because they're all gone. When we cleaned out the soil that caved in, we did not see the stones. It vanished like it was never there in the first place. Somebody must have stolen the stones but we could not point out a finger as to who took it because we did not really see anybody taking it. Only God knows who stole the stones. We will let our Heavenly Father to take care of these things for us.