I am using the trial version of PM 4.5.2 on Mac 10.4.10.  When I select several pictures, add keywords using the Structured Keywords panel, and then open the IPTC Stationery Pad, add other metadata besides keywords (which I leave blank) and hit "Apply Stationery to Selected," all of the keywords added from the Structured Keywords panel are erased in the images.  Am I restricted to adding keywords only after all other metadata has been added?  If so, this can be frustrating if I need to change the title or caption after I have added keywords, because I will have to redo the keywords after applying the changes to the caption or title.  I am new to using the metadata funtionality of PM, so please advise if I am missing something.  Thanks.