Problems posting pictures.

I recently posted a new thread but am having issues posting pictures. They are from my samsung galaxy S7 which is what I used to make the thread. One of the pics will show up, but the others will just show as icons. Any advice on how to fix this?

I use a I phone 7, transfer the pics to the computer and then post. It always brings the pics up to the post, Some times they all show up some times only one shows up. I helve even tried posting a new pic to a reply and it just shows a blank reply. I do not know what I am doing wrong.

I use Flickr, has an app for my phone and then post from there. Good luck!