Jim D when you press the arrow next to save choose save as.
It probably won't take you to the file you want to save the modified immage to.
This is what happens to me, I select the immage from Library-Pictures-5/30/2012.
Then I'll modify the immage the way I want, select DOWNLOAD, select ARROW next to SAVE at the bottom of the screen, select SAVE AS and this is what comes up Library-Pictures-coins-dimes-mercury-1942/41.
1942/41 is probably the last file I saved somthing to. but that isn't where I want this immage to go.
Go back and select the PICTURE file locate and select the 5/30/2012 FILE and then save the immage to that file and it will join your original immages. Which can now be down loaded to your post.
I wil usually set up a new file for the modified immage and put the immage there for easy reference.
Hope I'm understanding your problem and this helps.