Different Omega based themes for frontend and for admin.

Impossible to use different omega based themes for frontend and for admin.
Something wrong with alpha_theme_trail().
I replace this line (alpha/includes/alpha.inc:188):

if (!isset($static)) {

to

if (!isset($static[$theme])) {

It is better, but still does not works. Does not save the theme settings.
The theme settings saving is only works for the first theme. (system weights)
Every later ones theme settings form filled with the values of the first one, but the save does not works.