Can not replace doors.

I can not explain this bug, because I don't know anouth about replace dobble blocks.

So. I would like creating a door replacer with cmd_blocks.
But there is any not working to replace doord them self and replace doors with air.

I was building and uploaded a structure with the cmd_blocks I mean.
The uploaded pictures will show you the stucture.

Please tell me, if got a misstake with the cmd_blocks or cmds.