First: I figured it out. The file extention for the rouge two files was in caps (PNG). The rest were lowercase (png).
Glad to hear you got it working.
Third: How do I embed an image under the spoiler [spoiler ][ /spoiler]? And how do I link one directly into my post instead of under everything?
This is how I do it.
(If someone has a better method please let me know.)(1) Attach an image to your post.
(2) Post that post to the forum.
(3) Copy the url of the image you just attached to the post.
(4) Edit / Modify the post.
(5) Paste the attached image file's url into the forum post you are editing.
(6) Encapsulate it with the image code brackets:
[img][/img]
Example with the image URL inside:
(Don't worry that the address doesn't end in .png, .jpg, gif, etc.)[img]https://openxcom.org/forum/index.php?action=dlattach;topic=10092.0;attach=54836[/img]
(7) Encapsulate the image brackets inside the spoiler code brackets:
[spoiler][/spoiler]
Example with the image URL inside:
[spoiler][img]https://openxcom.org/forum/index.php?action=dlattach;topic=10092.0;attach=54836[/img][/spoiler]
Having to link the images after first posting it by editing the post is a bit strange but it works.