Hi Robert. Sorry for the delay getting back to you. To address your first post...you should be able to load images to posts (to your member profile) on a mobile device. I just checked with my phone and it is working fine. I have an andriod phone and using chrome all the functionality is the same as a desk top.
We are aware of the slow loading times on the site and are working on that issue. Hopeing to have that resolved soon.
To your second question, posting images in the Forums is a little different in that the function of inserting an image into a forum post is currently unavailable. However, if you want to include an image (or video) into a forum post you could insert a link from an image sharing site like Imgur or YouTube.
I hope this helps!