Okay, that is the problem then. Please mind that repeater fields may not work whatsoever as those store items indirectly as reference, and it is almost impossible to filter by them via a database query.
If you want, you can add temporary FTP and back-end access, and I can try debugging the code why ACF return the field values in random order. Maybe there is some sort of a configuration I can push programmatically to fix the ordering.