This is actually the way bolding and italicizing works for our app.
It’s a markdown type of formatting that allows you to see exactly where the formatting will be placed.
When you Ctrl+B and ** this ** appears, anything written between these four asterisks will appear bolded when you select outside of the item. The same goes for __ these __.
OK. I got it, thanks. I thought there is a bug on web server, actually there is a bug in my mind:)
But it will be more convenient if it makes bold directly after i select the content and press Ctrl+B, just like MS Office.