One quick question, what language did you select in the Training Gym Pro? Is the gpx file saved in what language?
Have you tried setting program's language to English? Were you able to duplicate the same problem after that?
For my test procedures, I have set the Training Gym Pro to its default language (English). I loaded the tracks from the watch and save it as a gpx file. Then, open that gpx file and upload the trackpoints to the watch with no problems.
As for the posting issue, I checked with another forum admin that the answers to forum verification questions has been modified as you have explained. The reason for this change is for forum members to easily post a topic. Sorry for the inconvenience about this. Also, thanks for understanding.