Miffed at Topic Character Limit

I'm not sure how to put this. I have a certain topic that I'm trying to pitch again, but the last time I tried to post it, it refused to let up until I split the plot and rules in half! Not only this, but in trying to keep the plot and rules intact/together, I still overstepped the no double post rule and had to wait on someone else posting just to post the rp rules again??

A 3,500 character limit is Extremely inconvenient for rp topic starters. I want to post my rp, but especially with the recently revised/reclarified site rules I'd rather not pull in my sister to cut between the potential posts to avoid double posting (because that's probs also bad and would result in a ban... right??? gosh idk X X;; )

What should I do? Is there any way to not double post and not rely on my sister to prevent said double posting? Should I ask why there's a character limit? and where should I ask it? Help forums? A ticket?

I can't lie, I'm frustrated. There seems to be no way to work this out. I'm open to suggestions even if they're worded mean. //shrugs