P.s. The datasets look nasty as I copy-pasted them here, but in Galaxy the tab separation is fine.
Sorry, this question is not compete. Can you please rephrase your question?
Thanks for getting back on this - I am a new user of Galaxy, and missed something trivial with the workflow: I had to convert the necessary files from tabular to interval, as it is actually suggested at the bottom of the page... Duh!!
But I did not realize it until started to think how to explain my problem more clearly to you.
Thank you for your fast response!
Your welcome! Happy research in the Galaxy!