Data about bandwidth usage in ORBIT2 compared to ORBIT1 is quite larger for all our servers,
not just rounding error.

Orbit1 shows normal usage, but Orbit2 shows greater usage for same server.

Just For example:

Orbit1
Allowed Bandwidth Usage: 3500 GB (RAW)
Quick RAW Bandwidth usage: 3,462.3 GB
Estimated RAW Bandidth Usage: 3,577.7 GB

Orbit2
Allowed Bandwidth Usage: 3500 GB (RAW)
Quick RAW Bandwidth usage: 3545 GB
Estimated RAW Bandidth Usage: 3663 GB

Which one is used for billing overage?