How to use RetroArch in Gameshell?

In RetroArch, I enter to assign the Hotkeys and when I press A on “Load State” (for example) I get 5 seconds to press the combination of buttons. However, when you press them, the account continues backwards and those buttons are not assigned.
In version 0.2 of ClockworkOS I do not have that problem, so I guess it is a “bug” of version 0.3
Has anyone solved it?
I also have problems with the Aspec Ratio of some emulators like Game Boy, Sega Game Gear, Super Nintendo …
I think I’ve seen a topic related to this a while ago … but I would really appreciate it if anyone could tell me where to look for the solution.
Thank you very much partners!