There are loads of differences between the 'apply stuff to Mayor's House' and the 'delete from star menu' interface.
If stuff is important you should read it, becoming blind to it is no excuse. You don't become blind to confirming warnings when you are using real money.
When in doubt, ALWAYS push the red cancel button. It will undo your last action (like clicking on the small cross). It also has a different shape, so the colour is no problem.
PS.
BB, please give us the option to delete every buff (or everything). I would love to get rid of the sandman and retro buffs (and my marshals).