When you configure OSS inventory to export lists daily, two inventory lists can appear under the same GMT date. This happens because inventory tasks run when background resources are idle — not on a fixed 24-hour cycle — and inventory list timestamps use GMT, which is 8 hours earlier than UTC+8.
How this happens
OSS schedules each daily inventory task when background resources are idle on the same day. If the first task runs early in the day and the next task runs shortly after midnight (UTC+8), the interval between them can be less than 24 hours. When both timestamps are converted to GMT, they can fall on the same calendar date, producing two inventory lists with the same date label.
Example
You configure daily inventory export. At 18:00 on December 10, 2023 (UTC+8), the first task runs immediately because background resources are idle, generating an inventory list timestamped 2023-12-10 10:00:00 (UTC).
The next task runs at 01:00 on December 11, 2023 (UTC+8), generating a second inventory list timestamped 2023-12-10 17:00:00 (UTC).
Both timestamps fall on 2023-12-10 in GMT, so two inventory lists share the same date.