Ordering is determined across both Hotel Collect and Expedia Collect properties.
If we look at the ActivePropertyBusinessModel file, we’ll see properties with a SequenceNumber starting with 1 since that file includes all properties.
The ActivePropertyList file only contains Expedia Collect properties which happen to be farther down in the list. So if you can't find a property in ActivePropertyList file starting withSequenceNumber 1, it should be there in ActivePropertyBusinessModel file.
Also, the sequencing which is given to product team by Analytics allows for ties so we’ll see multiple properties with the same number.