this bug exists for years:(

[fate_bear_win]

1. Please ensure the battle just starts, or only defense or wait orders are applied after battle start
2. click the magicbook and keep holding the left-button of the mouse, no releasing
3. prepare to press D
4. release the left-button of the mouse, meanwhile(with a deviation<10msec)press D
4. spell applied from single to group

[skycrow]

I just reupload your linked pic for those who can't see your pic.

http://imgur.com/G0iTv

6620f303738da977cbc056c8b051f8198418e393.jpg

[ckdamascus]

Wow, that is so cool!