Thanks, I join in the mail group just now.
Do you know how to solve the problem ?

ÔÚ 2016-12-06 21:44:39£¬"Michael Welle" <mwe012008@gmx.net> дµÀ£º
>Hello,
>
>ëÏþΰ <maoweirm@126.com> writes:
>[...]
>> I use the spacemacs, in org-mode 9£¬under TODO item£¬I set "SCHEDULED:
>> <2016-12-06 Tue 10:00-17:00 +1d> DEADLINE: <2016-12-09 Fri 18:00 -2d>"£¬
>> press t , Done£¬and the 'SCHEDULED:' is disapear, only DEADLINE:
>> <2016-12-09 Fri 18:00 -2d>£¬I don't know why ?Anyone meet the problem
>> ?
>
>someone in #org-mode mentioned something similar this morning.
>Ex.:
>
>* TODO foo
>  SCHEDULED: <2016-12-06 Tue 10:00-17:00 +1d> 
>
>foo bar: <2016-12-06 Tue>
>
>
>Setting this task to done removes the SCHEDULED line, instead of setting
>the date forward. The trouble is the second active time stamp.
>
>Regards
>hmw
>