Hi,
I found this happening, when trying to stop an active survey:

Stopping active survey
- Choosing "Stop this survey" for a survey listed as active ->
- Choosing "Expire survey" on a page where also "Deactivate" is option ->

Gives a message:
" The survey was successfully expired by setting an expiration date in the survey settings. "
on the Survey Summary page.

Sets the expiration dateas 8.12.2015 15:15, when command to Expire is given on 9.12.2015 15:15. The survey still remains as active, altough the expiration is (automatically) set for yesterday. Happens at least on a survey created with earlier version of Lime.
Conclusion: CANNOT EXPIRE OLD ACTIVE SURVEYS

This is a bug right? If so, can someone capable put this to issue tracker.
Hopefully 2.5 gets fuctionalities working soon! Awesome work.

Trifon, can concur, this is also happening for me also. Unable to expire surveys created on a previous version.

Please report this in the bug, so it can get fixed before 2.5 stable gets released.

Reporting a bug is basically not much more difficult than writing on the forum.