Hello Patrick

You should be able to determine this from the "last modified" time on the "ldf" file (unless it has autogrown in the interim - which seems unlikely as it is still only 1MB)
Does the database have logged activity happening? (make sure)
Is the autoshrink database option turned on? (You wouldn't see a SQL agent job if that was the case a background task performs these shrink operations). This setting is extremely unrecommended
You can also go for Microsoft support for shrinking database

https://msdn.microsoft.com/en-us/library/ms189080(v=sql.105).aspx

https://support.microsoft.com/en-us/kb/307487

keep updating us

Thanks

Anil