Its really not too hard guys.
When you click manage attachments upload the pics you want, then don't close that WINDOW!!! Leave it open, right click on the uploaded images in that window, then go to you post, click on the insert image button then right click again and paste into the window that pops up, repeat for more images, when your done you can close the manage attachments window. No preview post needed or edit needed. If you guys still have trouble I can do a video on how to do this, will make it much easier to follow.