I have strange problems in some areas of the admin. Tried to edit a coupon or add a new on - didn't have an option to save it.

Instead, after hitting preview button was sent to the admin control panel.

Same with the attempt to eliminate Free Shipping option - put "false" and then after trying to save was sent back to the admin front page.

Is it a possibility that after my admin was hacked, and I applied security patch, something doesn't work?

Please help!