For the pros

Here is the background summary
Motion filed in April, Summary judgment hearing back in July...this was the 3rd CA collecting for the latest CA that purchased the account.
At the hearing, I didn't spell it out enough they had "purchased" the account (it was noted in my response to their motion)...but did dispute amount due...Judge granted "partially" in their favor...we are scheduled for trial in April to determine the amount due.
A few months ago I received an offer of $1500 from this 3rd CA, (they are seeking $2441 & climbing; original debt was $1,328). After researching on internet, found they most likely pd $13.28 for the account (5.5 yrs. old) so I counter-offered $900 (still a profit for them) and requested deletion of dual reporting to EQ of same acct, as well as reporting "paid in full" (have tried for 2 years to get corrected, completely unsuccessful).
No response received. I recently wrote the Judge since I'm representing myself...the response was trial date still remains, but "if not completed, the parties need to undergo ADR (mediation) as ordered. My question for anyone is this...since they are suing me, do I need to initiate the ADR? I would think they are the ones that need to initiate, and if they don't, do I not win by DEFAULT on their end?
2nd question - I would like to sue them for violation (reporting dual account), they continue to do it monthly so I believe I have one year from any given month...is it Federal Court since they are located in a different state than me, or can I use Small Claims/Conciliation Court?
Yes, I care VERY much about clearing my credit, however, they brought the action against me..
Thanks for your help!!