Selection range not returning results when I select multiple cells on Numbers version 11.2

Here's the workflow

-- table
			set the myTable to (the first table whose class of selection range is range)
			tell myTable
				
				set myRange to the selection range
				set myNum to the count of cells of myRange
				set myFolder to choose folder with prompt "Boss, where your screen matrix folder huh?"
				set myFolderPath to quoted form of the POSIX path of myFolder
				set myTargetPath to myTargetFolder as alias
				set myTargetPath to quoted form of the POSIX path of myTargetPath
				
				-- repeat with all cells
				repeat with i from 1 to myNum
					
					-- if it's the even cell
					if i mod 2 is 0 then
						
						-- if it's not empty cell
						set myValue to the value of cell i of myRange
						if (myValue is not equal to missing value) then
							
							set myFlag to false
							
							-- copy & paste files to ali
							my CopyPasteFiles()
							
							-- if no new files are copied
							if myFlag is false then
								
								-- did the file existed before
								set checkFile to my SetupFile((myTargetFolder as string) & myValue)
								if (my FileExists(checkFile) is equal to true) then
									
									set the font size of cell (i - 1) of myRange to 17
									set the text color of cell (i - 1) of myRange to {65535, 65535, 65535}
									set the value of cell (i - 1) of myRange to "USE XXX"
									set the background color of cell (i - 1) of myRange to {65535, 0, 0}
									
								else
									
									-- it didn't so mark red
									set myMissing to myMissing + 1
									tell application "Numbers"
										set the background color of cell i of myRange to {65535, 0, 0}
									end tell
									
								end if
								-- did the file existed before
								
							else
								
								-- select cell
								set the font size of cell (i - 1) of myRange to 16
								
							end if
							-- if new files are copied
							
						end if
						-- if it's not empty cell
						
					end if
					-- if it's the even cell
					
				end repeat
				-- repeat with all cells
				
				-- select back the initial cells
				set selection range to myRange
				
			end tell
			-- table

Thanks.

Here's the script:

set selection range to myRange