After checking with Testing, Development and Product Marketing, the search is controlled by Apple. The assumption is the listing is based on the number of downloads. A message to Apple has been submitted for clarification.
When you submit an application to Apple, you can include keywords. The assumption is those other listed applications may have been created using the iOS App SDK which includes the keyword "FIleMaker, Inc."
I kind of thought that was the way it worked, but still hoped that there was a way that FMI could control the order.
For keywords, maybe FMI should send out a notice to those developers that FMI is not there company.