Retaining wall problem
I just recently had a cement block retainer wall built and have a question about it. The wall is about 5' high and is built of Diamond Pro straightface 8" x 12" x 18" interlocking, trapezoidal, cement blocks. It was built by a local landscaping firm. The wall is 50' long, is backfilled with rock and sand. The wall has a french drain on the backfill side. My concern is as follows: When first built the wall had a slight lean in toward the backfill side, which is normal as each block interlocks and offsets slightly. Approximately 2 weeks later 1/2 of my wall is straight, vertical, and the other half which has less backfill (therefore less weight) has retained its lean. I called the landscaper and asked if they had installed a geogrid (geo-stabilizer) since the wall was over 4' high (manufacturer recommends this). He told me no, that the wall did not need one. My question is this; is this wall going to continue to move and push over backwards or is straightening just normal and my wall is ok? I have asked the landscaper to come back out and check the wall but I suspect that he is going to say this is normal and I don't have anything to be concerned about. We paid a lot for this wall installation ($23/sq. ft) and I don't want to have the wall fall over on my neighbor's property 1-2 years from now when we will be stuck with a costly repair. Is there anyone out there who has had a similar problem and has any suggestions.