I'm pretty sure your work in our joint RP earlier this week still counts as being your work since it was mentioned at the top of the RP that it was your own writing. I don't think there's a rule that your work HAS to be in a separate post at all unless I am mistaken. The only rule I see is that the most you can post by yourself as manager is 1.

For what it's worth, I loved what you did for that RP and am very appreciative for your help this week!