[FIX] can unsubscribe

delta is between date in the future and now not the opposite
To get the full timedelta in hours we should get the days number and the seconds

macavrac_base/models/planning.py

@@ -64,7 +64,8 @@ class Task(models.Model):
             if now > rec.start_time or rec.state != 'open':
                 rec.can_unsubscribe = False
             else:
-                delta = (now - rec.start_time).seconds / 3600.0
+                delta = (rec.start_time - now)
+                delta = delta.seconds / 3600.0 + delta.days * 24
                 rec.can_unsubscribe = delta >= max_hours