Problems with exporting to IFC

Hi,
I have a few problems with exporting to IFC.

1. After export to IFC there are additional elements that were not in the .dgn file



2. When inserting base plates, I used the mirror. All elements inserted using the mirror function were exported to IFC incorrectly. They display correctly in the .dgn file.



3. The last and the biggest problem - the antennas are completely in a different place after exporting to IFC.
 

Any ideas how to fix it?
 
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