Viemu and Vim don't works exactly exactly the same and maybe some instructions like in your case works slightly differently.
Is not a bug, but for future releases we will work to improve issues like that.

I was reading the following article:
http://stackoverflow.com/questions/1218 … 18#1220118

It mentions using a relative range for a command.

For example:

:.,+21g/foo/d

This should delete any line from the current line through the next 21 lines that contains foo.

With ViEmu I'm getting prompted that a backwards range is given and do I want to swap it.

In Vim this works fine.

Am I missing something here, or is this a bug?