Hi @Ricardo_Castro and welcome to the Forum!
Thanks for reaching out, sorry to hear you’re running into trouble. That does sound strange! Both should be CSV files; if the project is rather “light”, the CSV will automatically download while if there is a loads of tasks, we’re sending it via email, but in both cases the format is the same.
If this is not the case for you, could you please forward these two files to our support team so they can investigate further?
Feel free to share the URL of this thread too, so you don’t have to re-explain everything! Again, so sorry for the trouble here!