Проблема с сохранением объекта карты после вставки точки метрики

#include <QString>
#include <QDebug>
#include "mapapi.h"
#include "sitapi.h"
#include "rscapi.h"
#include "mapcreat.h"
#include "maptype.h"

void appentPointPicture(HMAP hmap, HOBJ hobj, int x, int y) {
   double xp = x;
   double yp = y;
   mapPictureToPlane(hmap, &xp, &yp);
   mapAppendPointPlane(hobj, xp, xp, 0);
}

void insertPointPicture(HMAP hmap, HOBJ hobj, int x, int y, int index) {
   double xp = x;
   double yp = y;
   mapPictureToPlane(hmap, &xp, &yp);
   mapInsertPointPlane(hobj, xp, xp, index, 0);
}

void checkPointCount(HMAP hmap, HSITE hsite, long int number) {
   HOBJ hobj = mapCreateSiteObject(hmap,hsite);
   mapReadObjectByNumber(hmap,hsite,hobj,1,number);
   qDebug() << "points count: " << mapPointCount(hobj, 0);
   mapFreeObject(hobj);
}

// тест изменения метрики
int main(int argc, char ** argv) {
   QString* siteName = new QString("/home/user/temp/testMetrics.sitx");
   QString* rscName = new QString("/home/user/temp/operator.rsc");
   CREATESITEUN cs;
   memset((void*) &cs, 0, sizeof(cs));
   cs.Length = sizeof(CREATESITEUN);
   cs.EllipsoideKind = 9;
   cs.MapType = 16;

   HMAP hmap = mapCreateSiteUn((const WCHAR*) siteName->constData(),
         (const WCHAR*) rscName->constData(), &cs);
   if (hmap != 0) {
      HSITE hsite = hmap;
      HOBJ hobj = mapCreateSiteObject(hmap, hsite);
      if (hobj != 0) {
         mapSetRealShowScale(hmap, 10000.);
         //создадим объект
         if (mapRegisterObjectByKey(hobj, "11102500032503") != 0) {
            appentPointPicture(hmap, hobj, 10, 10);
            appentPointPicture(hmap, hobj, 100, 100);
            mapCommitObject(hobj);
            qDebug() << "points count after create: " << mapPointCount(hobj, 0);
            long int objNumber = mapObjectNumber(hobj);
            qDebug() << "real:";
            checkPointCount(hmap,hsite,objNumber);

            //вставим точку после первой
            insertPointPicture(hmap, hobj, 20, 50, 1);
            mapCommitObject(hobj);
            qDebug() << "points count after first insert: " << mapPointCount(hobj, 0);
            qDebug() << "real:";
            checkPointCount(hmap,hsite,objNumber);

            insertPointPicture(hmap, hobj, 20, 50, 1);
            mapCommitObject(hobj);
            qDebug() << "points count after second insert: " << mapPointCount(hobj, 0);
            qDebug() << "real:";
            checkPointCount(hmap,hsite,objNumber);
         } else {
            qDebug() << "mapRegisterObjectByKey error";
         }
         //освобождаем объект
         mapFreeObject(hobj);
      } else {
         qDebug() << "mapCreateObject error";
      }
      mapCloseMap(hmap);
   }

}

points count after create:  2
real:
points count:  2
points count after first insert:  3
real:
points count:  2
points count after second insert:  4
real:
points count:  4