I have been down this road. The system is Oregon is odd. Keep pushing and you will get a MTC to Arbitrate through, if that is your wish and your Agreement allows it.
The court system told me that there is no such thing as JAMS. Later, they told me that I never needed to MTC because the Agreement says it is okay. The judge eventually denied my MTC on the grounds that the Agreement says I have the right anyways. In other words, just pretend it is a normal state and go through the motions of a MTC, if that is your desire, and know that it is going to be odd.
For the record, you have to write your own motions. I just used the templates from other counties. This county did not seem to care what template was used, as long as it hit all of their date criteria.
I hope this helps, and please do use this forum's writing system.