Negative rate - raw value does not match recognized value

[p0macs]

The Problem

On my watermeter, I often have readings like this:

`2024-09-26T09:22:11+0200,main,569.5726,,579.6653,,0.0000,Neg. Rate - Read: - Raw: 569.5726 - Pre: 579.6653 ,4.9,7.4,9.7,6.2,7.3,2.5,6.0

2024-09-26T09:27:11+0200,main,579.5728,,579.6653,,0.0000,Neg. Rate - Read: - Raw: 579.5728 - Pre: 579.6653 ,4.9,7.4,9.6,6.1,7.3,2.7,8.1`

Can you explain why the raw value is 569.5726 - while the recognized values are:
4.9 -> 5
7.4 -> 6 (????)
9.7 -> 9
6.2 -> 5 (????)
7.3 -> 7
2.5 -> 2
6.0 -> 6

And again, why the raw value is 579.5728 - while the recognized values are:
4.9 -> 5
7.4 -> 7
9.6 -> 9
6.1 -> 5 (????)
7.3 -> 7
2.7 -> 2
8.1 -> 8

Version

Release: v15.7.0 (Commit: 0d0b018+)

Logfile

[0d20h46m28s] 2024-09-26T09:58:01 <ERR> [POSTPROC] main: Raw: 579.5728, Value: , Status: Neg. Rate - Read: - Raw: 579.5728 - Pre: 579.6653
[0d20h51m29s] 2024-09-26T10:03:02 <ERR> [POSTPROC] main: Raw: 579.5728, Value: , Status: Neg. Rate - Read: - Raw: 579.5728 - Pre: 579.6653
[0d20h56m28s] 2024-09-26T10:08:01 <ERR> [POSTPROC] main: Raw: 579.5728, Value: , Status: Neg. Rate - Read: - Raw: 579.5728 - Pre: 579.6653
[0d21h01m28s] 2024-09-26T10:13:01 <ERR> [POSTPROC] main: Raw: 579.5727, Value: , Status: Neg. Rate - Read: - Raw: 579.5727 - Pre: 579.6653

Expected Behavior

I would expect the raw value for '6.1' not to be 5 - but 6.

Screenshots

Additional Context

No response