In a recent update to the KWOF tool we decided to start pulling the data from the top 25 listings on page one for the Keyword phrase that you have chosen to run a session with.
We did this to improve the performance of the tool whilst keeping the integrity of the Keywords that are provided. This makes finding the most relevant keywords for your listing quicker and easier. 

With the new update you will see super fast load times and a more focused set of keywords that can easily fit into your listing saving you time and removing the need to go through and manually remove keywords as often from Listing Optimizer."