where are my posts going???

They might be deleted, there are lots of reasons why they get deleted so I hope you'd be more aware of the guidelines here. I also have a deleted post just this past couple of hours, not my own discussion but maybe from someone. Sometimes discussions/posts are deleted because they might be a spam, an abuse, a copy/paste or abusive. I'm not saying that you posted these, but just an example. Here's a link which came from mylot, I hope you read it to understand why posts get's deleted: http://www.mylot.com/w/discussions/457762.aspx

Since you are new, I would ask if you are accidentally hitting "preview" instead of posting. I have done that a time or two when I was tired. Good luck.