The new Edit CSS feature bugged?

I just upgraded my blog and it seems it doesn’t keep the css I add to the stylesheet. I add some random thing like:

#testing {
color: red;
}

Then I deactivate the theme and active an other one… Finally to re-activate the theme I first deativated… Now when I go back to the edit css page I no longer find what I added but just a empty file with the heading info as it was before.

Is this normal? Yes I notice the revisions section but I do not find this helpful at all if you got css edits for multiple themes…

My suggestion:

Is to have simply a dropdown menu on that page from which you can select the stylesheets you made and of course you should be able to delete them as well!

Edit: I just found out this is part of the Jet Pack plugin.

Regards,
Matt.