Move files by the name individually

Question

I use this script at the moment to move correctly named items from one folder to another and also copies to another folder.
A) make a copy of the correctly named image and place in dropbox.
B) 'move' the correctly named image to a temp image folder.(as backup)
The problem is that other files arrive during the script between A and B as a result those files only get moved and do not get copied to the dropbox.
I need this script to get a list of the files of the folder then process those specific files.
Many thanks
Matt
here is the script
tell application "Finder"
          set this_folder to folder (((path to desktop folder) as text) & "Hotfolder")
  --set destination to folder (((path to pictures folder) as text) & "HotDestination")
          set DropBoxDestination to folder (((path to home folder) as text) & "Dropbox:Temp_Hotfolder")
          set LocalDestination to folder (((path to pictures folder) as text) & "TempHotFolder")
          duplicate (files of this_folder whose name does not start with "MJC_" and name does not start with "SH_" and name does not start with "ARK_" and name does not start with "5" and name does not start with "0" and name does not start with "Focus" and name does not start with "Untitled" and name does not start with "ZZ__5" and name does not start with "SE__5" and name does not start with "NN__5") to DropBoxDestination
          move (files of this_folder whose name does not start with "MJC_" and name does not start with "SH_" and name does not start with "ARK_" and name does not start with "5" and name does not start with "0" and name does not start with "Focus" and name does not start with "Untitled" and name does not start with "ZZ__5" and name does not start with "SE__5" and name does not start with "NN__5" and name does not start with "VM__5") to LocalDestination
end tell

Answer 1

To work with the same items, try getting a single list of files and then using that list for your commands, for example:
  set theFiles to (files of this_folder whose name does not start with "MJC_" and name does not start with "SH_" and name does not start with "ARK_" and name does not start with "5" and name does not start with "0" and name does not start with "Focus" and name does not start with "Untitled" and name does not start with "ZZ__5" and name does not start with "SE__5" and name does not start with "NN__5") as alias list
  duplicate theFiles to DropBoxDestination
  move theFiles to LocalDestination