I set this Humax to record 2 things on at the same time. I try and change channel with the number buttons on the remote and I get the message "cannot change channel while recording" I try it with the up and down program button and it works. I try from selecting the channels in the menu and sometimes it does, sometimes it doesn't.
More and more intermittent issues are constantly adding to the list with this machine. If you look on Amazon you can see plenty of unhappy reviewers amidst the good reviews stating similar issues. Some are even getting a new replacement machine only for it to happen again down the line.