While waiting for 150+ long queue for Cyrodiil I decided to test what
@Dracane posted about encase during PTS
encase-and-its-morphs-are-not-working-as-intended. This is kind of addedum to his post.
Case subjects: 3 Camels east of Sandy Path Wayshrine in Craglorn
Case 1: No target but all 3 Camels are it target area
Result: Nothing is hit

Case 2: Targetting middle camel all 3 Camels are it target area
Result: Only 1 camel (my target) is affected

Case 3: Targetting eastmost camel all 3 Camels are it target area
Result: Only 1 camel (closest and also my target) is affected

Case 4: Targetting westmost camel all 3 Camels are it target area
Result: Only 1 camel (closest and also my target) is affected