Rendering animation retains old Keyframes

Hi, I’m new on this Forum (and pretty new to Blender)

I was trying to create a little intro for later video editing.
The idea was moving pictures and videos on a black mirror.
I began with the pictures, one from left to right and the second from top to bottom.
Later I realised it would be better from right to left.
So I deleted the keyframes in the grapheditor and made new ones.
As you can see in the video, the “preview” is correct, but the render still goes from left to right.

Any ideas?

BTW, that’s my dog.

From my limited experiences of using the sequencer, it’s more than likely that the sequencer’s cache is causing trouble here. Specifically, it has a tendency to hang on to the old versions of things long after they have changed.

This seems like a good idea.
I’m on a Mac with OSX 10.7.5.
I deleted the contents of ~/Library/Caches/org.blenderfoundation.blender
But this didn’t solve the issue.
Are there any other location for Blender’s cache files?