I thought this very clear except the---
2. Using "Invalid Item"  or "Invalid Entry" , post your Prep Contest Round submission. (R)
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I'm not a newbie but that stuff always confuses me. Maybe not x's but a fake demo?

You've worked with me for years and years and still those item or bitem or whatever they're called still confuse the heck out of me.

Maybe it's because I'm not a newbie anymore but each section you have up above seems clear. You've even underlined the place to submit the prep assignments. It does say first, which might make someone think there is a different place to log other assignments.
love, LinnAnn