
is this the problem you are asking about?
If so, I suspect the meter might be logging in Wh instead of in kWh.
And so for any values bigger than 99.9kWh (99 999Wh) it just stores the value as 99 999Wh.
So my suggestion would be to setup the meter to store in kWh, not Wh.
Unfortunately I don't know where this is done in MAP120, however I have seen that people program the meter to log in MWh, so I would think that Wh is also possible.
You'll have to dig around in MAP's profile setup of the meter.
If you don't come right, we can do a screen share meeting with the meter connected, then I can help you look for the setting, alternatively give L&G a call.