diff --git a/Layer.py b/Layer.py
index 20eaffc..bdd809f 100644
--- a/Layer.py
+++ b/Layer.py
@@ -1,17 +1,18 @@
 class Layer:
     #data = [(contour, (x,y,w,h)),]
-    data = []
+
     startFrame = None
     lastFrame = None
-    backgroundImage = []
 
     def __init__(self, startFrame, data):
         self.startFrame = startFrame
         self.lastFrame = startFrame
+        self.data = []
         self.data.append(data)
 
         print("Layer constructed")
 
     def add(self, frameNumber, data):
-        self.lastFrame = frameNumber
-        self.data.append(data)
+        if not (self.startFrame + len(self.data) - frameNumber < 0):
+            self.lastFrame = frameNumber
+            self.data.append(data)
diff --git a/LayerFactory.py b/LayerFactory.py
index 2df91c1..50992a9 100644
--- a/LayerFactory.py
+++ b/LayerFactory.py
@@ -34,13 +34,13 @@ class LayerFactory:
                 i = 0
                 for i in range(0, len(layers)):
                     layer = layers[i]
-                    
+
                     if len(layer.data[-1][1]) != 4:
                         # should never be called, hints at problem in ContourExtractor
                         print("LayerFactory: Layer knew no bounds")
                         continue
 
-                    if frameNumber - layer.lastFrame <= 5:
+                    if frameNumber - layer.lastFrame <= 1:
                         (x2,y2,w2,h2) = layer.data[-1][1]
                         if self.contoursOverlay((x-tol,y+h+tol), (x+w+tol,y-tol), (x2,y2+h2), (x2+w2,y2)):
                             foundLayer = True
diff --git a/__pycache__/Layer.cpython-37.pyc b/__pycache__/Layer.cpython-37.pyc
index ca0d5e4..62c7a0f 100644
Binary files a/__pycache__/Layer.cpython-37.pyc and b/__pycache__/Layer.cpython-37.pyc differ
diff --git a/__pycache__/LayerFactory.cpython-37.pyc b/__pycache__/LayerFactory.cpython-37.pyc
index 80ca3a9..7b77310 100644
Binary files a/__pycache__/LayerFactory.cpython-37.pyc and b/__pycache__/LayerFactory.cpython-37.pyc differ
diff --git a/short.mp4 b/short.mp4
index 33764e0..cd9e5d1 100644
Binary files a/short.mp4 and b/short.mp4 differ