The message means that your clock was corrected by more than 128ms. Your clock about 7 tenths of 1 second off in the worst case that you show. Is this really a big problem? If so, how much accuracy is actually required? I wouldn't take any action unless the clock was more than one full second off.

Since your jitter seems low, my guess is that your system's clock is running slow. Talk to the manufacturer. There may be a procedure to adjust it.