diff --git a/oxtimelines/timeline.py b/oxtimelines/timeline.py
index 7cfe1b6..3b8b0ec 100644
--- a/oxtimelines/timeline.py
+++ b/oxtimelines/timeline.py
@@ -304,7 +304,7 @@ class Timelines():
             self.frame_center = int(frame_size[0] / 2)
 
         self.large_tile_n = int(math.ceil(self.frame_n / self.large_tile_w))
-        self.large_tile_last_w = self.frame_n % self.large_tile_w
+        self.large_tile_last_w = self.frame_n % self.large_tile_w or self.large_tile_w
         if self.render_small_tiles:
             self.small_tile_n = int(math.ceil(self.duration / self.small_tile_w))
             self.small_tile_last_w =int(math.ceil(self.duration % self.small_tile_w))
@@ -413,7 +413,8 @@ class Timelines():
                     self._render_keyframes()
                 self.cut_frames.append(frame_image)
                 if self.is_last_frame:
-                    self.cuts.append(self.frame_n)
+                    if not self.cuts or self.cuts[-1] != self.frame_n:
+                        self.cuts.append(self.frame_n)
                     self._render_keyframes()
 
         # save large tile
@@ -439,8 +440,9 @@ class Timelines():
             wide = 1 if mode == 'keyframes' else self.wide
             frame_ratio = self.frame_ratio * wide
             cut_images = int(math.ceil(cut_width / (frame_ratio * self.large_tile_h)))
-            if cut_width == cut_images == 0:
+            if cut_images == 0:
                 print 'ERROR division by zerro', cut_width, cut_images
+                index = -1
             image_widths = self._divide(cut_width, cut_images)
             image_i = self.cuts[-2]
             large_keyframes_tile_i = self.large_keyframes_tile_i
@@ -473,8 +475,9 @@ class Timelines():
                         self.large_tile_image[mode] = Image.new('RGB', (w, self.large_tile_h))
                     self.large_tile_image[mode].paste(frame_image, (offset, 0))
                 image_i += image_w
-            if self.is_last_frame:
+            if self.is_last_frame and index > -1:
                 self._save_tile(mode, index)
+
         self.large_keyframes_tile_i = large_keyframes_tile_i
         self.cut_frames = []
         self.log and self.profiler.unset_task()