Dear Kazzlo,
The first issue is a known issue, we are investigating it and will get back to you soon.
The second issue, I cannot reproduce it, my test steps are:
2. Remove all text in cuteeditor
3. Copy some text
4. Paste it to CuteEditor
5. Remove text and then click "Backspace"
It works fine and I will not be redirected to back page.
Can you test it more? If you can reproduce it, please post steps here.
Thank you for reporting