I can't move a Mission to another Level, what should I do?

Not being able to move a Mission to another Level can be a result of one or more of the following:

1. The Level you’re trying to move the Mission to is full (has 60 Missions in it already, which is the maximum number of Missions per Level)
2. The Level you’re trying to move the Mission from has only one Mission in it, and moving it would leave the Level empty, which is not possible to do. In that case, add another Mission to the Level, then try again.

Check out this page for more information: How to move a Mission to another Level