Problems in writing IGES file

If we perform reading IGES file FRA62468-2.igs(from [user path removed]/files/), writing
result and reading from new file we receive that checkshape of result after
first reading is better:
after first reading:
 ------------------------------------------------
  Self Intersecting Wire ................... 15
  Unorientable Shape ....................... 17
  Bad Orientation of Subshape .............. 2
 ------------------------------------------------
  *** Shapes with problems : 34
  WIRE : 17 Items -> compound named wa_w
  FACE : 17 Items -> compound named wa_f
after second reading:
 ------------------------------------------------
  Self Intersecting Wire ................... 18
  Unorientable Shape ....................... 26
  Bad Orientation of Subshape .............. 8
 ------------------------------------------------
  *** Shapes with problems : 52
  WIRE : 26 Items -> compound named wb_w
  FACE : 26 Items -> compound named wb_f