From bug 7882, it seems that MARC fields should be able to be reordered, however it does not appear to be working. For instance, if I have a record with 3 650 fields and 2 651 fields, I cannot move the 651 fields above the 650 fields. I can rearrange the 650 fields amongst themselves, but that's it. The move icon/hamburger shows on all fields, which leads one to think that all fields can be reordered, when this is clearly not the case.
Hi Donna, you can reorder repeated fields (same number) and the subfields of each field, but not fields of different numbers. It's in the comment here: https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=7882#c64 Maybe we should turn this into an enhancement request?
I wonder if we should really be able to do this and if it would persist after saving.