Overview: 00X fields; backend reorders the fields based on what is sent by frontend when Creating/Deriving/Editing MARC records. 

Issue 1:

When editing a record, fields are automatically realigned in the following manner after saving: 

LDR → 001 (→ 004 for Holdings) → other 00X → 005 → other fields (including 999)

Issue 2:

When creating/deriving a record (where applicable), fields are automatically realigned in the following manner after saving: 

LDR → 001 (→ 004 for Holdings) → other 00X → 005 → other fields → 999 (999 is always at the bottom)

Expected Results: 00X fields positions are saved

Actual Results: 00X fields positions are reset