Could you tell us more about the issue you have about the concern you're running into? We'd like to know more about how we can help! How long has the issue existed? In addition, can you please specify the exact steps you are taking to reproduce this issue so we can assist you further?
With detailed information, we will be better able to assist you.
I'm looking at your remote photo and can tell you mine has 4 buttons; Netflix, Disney, hulu, 'n sling and NONE of the are a previous channel button. I've used the reverse, pause, and forward arrows view recorded programs, movies. Don't understand why this remote never came with a previous channel button. My Samsung remote for both TV's have said button for their channels.
We would recommend rebooting your network and your Roku device. Then try removing the channels from the Roku home screen by navigating to the channel tile, pressing the * key on your remote, and choosing 'Remove channel'. Then restart your device from Settings>System>System restart. Once your player starts up again, add the channels back once more.
Does this clear up the issue you are seeing? Please keep us posted.
We're here to help. Would you mind giving us more details regarding your concern? What are the steps to reproduce the issue you are seeing? Do you have a Roku simple or voice remote? What other troubleshooting steps have you already taken to try to resolve the issue?
Please let us know any additional information you may have that would be helpful for our team looks into this further.