G4 running 10.3 and Photoshop CS

In both the cutline box and the keyword box AFTER you enter the cutlines and the keywords, if you look in the box that comes up with the little triangle you will find all your keywords in there, even the ones that DO NOT pertain to that picture. I have pictures of
flowers but when you look in the triangle box I find words like airport that was from pictures I did last week. When these pictures are filed in portfolio will those words get picked up and wind up in the keyword list for that picture? In other words If I search for flower will all
the airport pictures show up too?
That file is going to get to be huge too. I would really like to shut that off.
Couldn't find out how to shut that FEATURE off in the manual.

Thanks,

John