How do I post more than one picture? I can only choose one picture from a file to post. I see where some have pictures posted in the text box and there are more than one picture, I would like to do that. Thanks.

Two choices:

Use offsite photo hosting (tinypic.com for example) and use BBCode to insert them into your post. This is also polite because it conserves bandwidth here.

Make multiple posts in the same thread and upload one photo to each post, then open the attachment link, copy the URL, and use BBCode to insert them into your posts to make them visible without clicking the links.