Hey Boyan,
So, I understand what you are talking about. A way for this is to either compare the robots by placing the individual ones in a demo account and the portfolio ones in another demo account and compare the trades of each robot by seeing what time they were opened for example.
Another way is by seeing the code which might be a little bit more complicated but you can see what are the properties of each individual robot and also see what are the properties of the strategies in the portfolio robot.
About the issue with the different symbol, I saw that on the screenshots you sent and I am not sure what the issue is on that. I would suggest here to try and download a new portfolio robot and see if that happens again.
Hope this helps!
If there is anything else I can assist you with, let me know!
Kind Regards,
Nikos