CIF data incorrect #1116

I use the following code to read CIF files.

       Structure structure = null;
      AtomCache cache = new AtomCache();
      cache.setPath(workdir);
      cache.setFiletype(StructureFiletype.CIF);
   
      StructureIO.setAtomCache(cache);
  
      structure = StructureIO.getStructure(pdbFile);

and structure.toMMCIF() to convert into a list of strings.

The original CIF has HETATM lines as

HETATM 1049 S S1 . 0KA C 2 . ? -5.639 -7.082 12.045 1.00 17.18 ? 101 0KA B S1 1
HETATM 1051 S S3 . 0KA C 2 . ? -6.031 -7.348 15.700 1.00 16.42 ? 101 0KA B S3 1
HETATM 1052 S S4 . 0KA C 2 . ? -9.120 -7.026 13.781 1.00 13.07 ? 101 0KA B S4 1

But after reading the CIF, I've

HETATM 1049 S S1 . 0KA C 2 101 ? -5.639 -7.082 12.045 1.00 17.18 101 0KA B S1 1
HETATM 1051 S S3 . 0KA C 2 101 ? -6.031 -7.348 15.700 1.00 16.42 101 0KA B S3 1
HETATM 1052 S S4 . 0KA C 2 101 ? -9.120 -7.026 13.781 1.00 13.07 101 0KA B S4 1

The 9th column in the original CIF is a dot; instead, in the structure object is 101 equals the 16th column (the _atom_site.auth_seq_id).

Is there a way to have the same original HETATM lines in the structure object?