Oh Tcas, you mean the 25 kg., who gives a S....
Seriously, the counters increment in 25 kg. interval, that means left main containing 2163 kg will be shown as 2175 kg (rounded up) and right main containing 2338 kg will be shown as 2350 (rounded up). The totaliser wil read 2163kg plus 2338 kg equals 4501 kg, and that will be shown as 4500 kg (rounded down).
It is quite normal just a rounding error and nothing is wrong with it.