You mention a "time suffix" in the comments of the file.
This is maybe formatted in a way that is confusing for the parser that decides how to group epochs in groups.
The files should be grouped by the averaging process in the same they are in the database explorer.
Could you post a screen capture to illustrate how the files are grouped in the database, so we can evaluate whether we should change anything in this algorithm?
Thank you for trying to help us improve the software!