Amanda backup doing (three?) parallel backups at 01:00?

After digging around a bit with amanda, I’m a bit startled on this output:

[08:17:50] backup@openhabMain:/home/openhabian$ amtape openhab-dir show
scanning all 15 slots in changer:
slot   1: date 20210515010032 label openhab-dir-01
slot   2: date 20210515010032 label openhab-dir-02
slot   3: date 20210517145301 label openhab-dir-03
slot   4: date 20210517145301 label openhab-dir-04
slot   5: date 20210517145301 label openhab-dir-05
slot   6: date 20210518005840 label openhab-dir-06
slot   7: date 20210518005840 label openhab-dir-07
slot   8: date 20210518005840 label openhab-dir-08
slot   9: date 20210519010136 label openhab-dir-09
slot  10: date 20210519010136 label openhab-dir-10
slot  11: date 20210519010136 label openhab-dir-11
slot  12: date 20210513010122 label openhab-dir-12
slot  13: date 20210513010122 label openhab-dir-13
slot  14: date 20210514005754 label openhab-dir-14
slot  15: date 20210514005754 label openhab-dir-15

Normally, I would expect one slot per day, but it seems, there are multiple ones starting? is this normal behaviour, or did I break something?
I only started one manual amdump openhab-dir test monday afternone once (20210517145301), but it seems, i always get three backups for one. I started openHABian multiple time (could be three times?), to overwrite existing configurations, so could it be that?

Systemd timer shows only one:

[08:19:02] openhabian@openhabMain:~$ systemctl list-timers
NEXT                          LEFT          LAST                          PASSED       UNIT                         ACTIVATES
Wed 2021-05-19 08:45:06 CEST  25min left    Wed 2021-05-19 04:14:32 CEST  4h 4min ago  apt-daily.timer              apt-daily.service
Wed 2021-05-19 10:13:15 CEST  1h 54min left Tue 2021-05-18 10:13:15 CEST  22h ago      systemd-tmpfiles-clean.timer systemd-tmpfiles-clean.service
Thu 2021-05-20 00:00:00 CEST  15h left      Wed 2021-05-19 00:00:00 CEST  8h ago       logrotate.timer              logrotate.service
Thu 2021-05-20 00:00:00 CEST  15h left      Wed 2021-05-19 00:00:00 CEST  8h ago       man-db.timer                 man-db.service
Thu 2021-05-20 00:56:48 CEST  16h left      Wed 2021-05-19 01:01:35 CEST  7h ago       amdump-openhab-dir.timer     amdump-openhab-dir.service
Thu 2021-05-20 02:02:47 CEST  17h left      Wed 2021-05-19 01:56:57 CEST  6h ago       amandaBackupDB.timer         amandaBackupDB.service
Thu 2021-05-20 06:09:39 CEST  21h left      Wed 2021-05-19 06:38:40 CEST  1h 40min ago apt-daily-upgrade.timer      apt-daily-upgrade.service
n/a                           n/a           Sat 2021-05-15 09:17:05 CEST  3 days ago   firemotd.timer               firemotd.service

8 timers listed.
Pass --all to see loaded but inactive timers, too.

Where did I screw up this time? :wink:

It’s still here:

the slot-directory, that gets filled first, has about 3.25GB (e.g. slot12), same goes for the second (e.g. slot13), the third one (e.g. slot14) has abou 650MB.

how can I check, what starts each slot?