You don't need premium photobucket, I've just got the free standard PB and it works everytime. On the photo you have uploaded to PB point your mouse cursor to the left hand upper corner and you'll see a small square of lines which drops a window while you are pointing, point to "Share" which is first choice in the drop down list, click with left button on mouse and it will then bring up a window with share options on the right hand side, select IMG by pointing in box just below IMG word and left click again. Now go back to your post window and right click in it and select paste. The address will show but when you submit your post the photo will show.

You just repeat above for each photo you wish to post. Leave a space between photos on your post by positioning your cursor two spaces from the bottom of each photo then you can add a title or text in between each photo.

When you get it you'll wonder why you didn't before