Your comments

Thank you for reporting this. This has been fixed in version 0.4.2
Agreed. This has caused a bunch of confusion. This has been changed for version 0.4.3
A very annoying bug. This is fixed in version 0.4.3
A delete key is a good idea. I implemented this for the next patch. At some point in the future I will probably make this a configurable key.

This will be available in version 0.4.3
I don't currently have plans for adding this. If there is lots of interest in this feature I will of course reconsider. 
Good idea. I'll add this in the near future.
Thanks for sharing! Love the screenshot!