My son-in-law told me to do this.....
Pick the photo you want to show and when it enlarges there is copy thing (HMTL or something like that) at the bottom of the list. Right click and when it says "copied" click on "ctrl + c" then when you get to where you want to place it click on "ctrl + v" and it is there. It doesn't show up as the picture until you hit "post" and reinter your message though.
Didn't explain that very well, but it works for me every time.