It sounds like you are comparing documents viewed in the desktop clietnt with the AJAX output on the AP. To see what an AJAX model will look like, swtich the desktop client to web view:
View menu | Turn on/off WebView.
Web view is not a pixel perfect match to the desktop client due to web browser limitations.
Or if you are using IE, you can use the IE plugin which will render the models the same as the desktop client.
Hope that helps
You will need to install the plugin. The install file is stored on your server when QV server is installed (at least it was the last time I looked). If you do not have an install link on your AP screen, I suggest that you speak to your IT department.
It is also installed on your machine if you install the desktop client. The client is available as a download on the main qlikview site.
This applies to all your QV users. The attraction of the AJAX client is that it is zero footprint - with no user requirements other than a suitable web browser.