diff --git a/.gitignore b/.gitignore
index 743924f1..961fd7cb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,9 +7,7 @@ special_animations.py
 prettiness_hall_of_fame.py
 files/
 ben_playground.py
-
 ben_cairo_test.py
-
-.idea/manim.iml
-
 *.xml
+*.iml
+
diff --git a/animation/transform.py b/animation/transform.py
index 799b776f..30d7c7d2 100644
--- a/animation/transform.py
+++ b/animation/transform.py
@@ -22,8 +22,9 @@ class Transform(Animation):
         #Copy target_mobject so as to not mess with caller
         self.original_target_mobject = target_mobject
         target_mobject = target_mobject.copy()
-        digest_config(self, kwargs, locals())
         mobject.align_data(target_mobject)
+        self.target_mobject = target_mobject
+        digest_config(self, kwargs)
         self.init_path_func()
 
         Animation.__init__(self, mobject, **kwargs)
@@ -40,7 +41,7 @@ class Transform(Animation):
     def init_path_func(self):
         if self.path_func is not None:
             return
-        if self.path_arc == 0:
+        elif self.path_arc == 0:
             self.path_func = straight_path
         else:
             self.path_func = path_along_arc(
diff --git a/helpers.py b/helpers.py
index a01ced7a..8e1af238 100644
--- a/helpers.py
+++ b/helpers.py
@@ -670,3 +670,10 @@ class DictAsObject(object):
 # Just to have a less heavyweight name for this extremely common operation
 def fdiv(a, b):
     return np.true_divide(a,b)
+
+# For debugging purposes
+
+def print_mobject_family(mob, n_tabs = 0):
+    print "\t"*n_tabs, mob, id(mob)
+    for submob in mob.submobjects:
+        print_mobject_family(submob, n_tabs + 1)
diff --git a/mobject/mobject.py b/mobject/mobject.py
index d1e77b32..cf01b713 100644
--- a/mobject/mobject.py
+++ b/mobject/mobject.py
@@ -771,10 +771,10 @@ class Mobject(Container):
             self.null_point_align(mobject)
         self_count = len(self.submobjects)
         mob_count = len(mobject.submobjects)
-        diff = abs(self_count-mob_count)
-        if self_count < mob_count:
-            self.add_n_more_submobjects(diff)
-        elif mob_count < self_count:
+        diff = self_count-mob_count
+        if diff < 0:
+            self.add_n_more_submobjects(-diff)
+        elif diff > 0:
             mobject.add_n_more_submobjects(diff)
         return self
 
diff --git a/mobject/vectorized_mobject.py b/mobject/vectorized_mobject.py
index 5377eb44..fbf055b0 100644
--- a/mobject/vectorized_mobject.py
+++ b/mobject/vectorized_mobject.py
@@ -42,7 +42,8 @@ class VMobject(Mobject):
                        stroke_width = None,
                        fill_color = None, 
                        fill_opacity = None,
-                       family = True):
+                       family = True
+                       ):
         if stroke_color is not None:
             self.stroke_rgb = color_to_rgb(stroke_color)
         if fill_color is not None:
diff --git a/topics/geometry.py b/topics/geometry.py
index 2312e74b..8e3f910b 100644
--- a/topics/geometry.py
+++ b/topics/geometry.py
@@ -356,7 +356,7 @@ class Line(VMobject):
     def insert_n_anchor_points(self, n):
         if not self.path_arc:
             n_anchors = self.get_num_anchor_points()
-            new_num_points = 3*(n_anchors + n)+1
+            new_num_points = 3*(n_anchors + n)-2
             self.points = np.array([
                 self.point_from_proportion(alpha)
                 for alpha in np.linspace(0, 1, new_num_points)