An issue with the Block manger on home page

[Abdulrhman]

I have an issue of moving custom sidebars on the home page 

this is a photo showing the issue 

look to this photo

http://prntscr.com/7nq3yb

but in sub forums 

I can move it and its working good

look to this photo

http://prntscr.com/7nt0mu