the Oct 3 pt 1 submission is if you want an off-campus interview. I.e. you don't want to fly to campus.
I believe you are now obligated to visit campus. You might be able to schedule something off campus but that was the whole point of the 10/3 deadline.
You are still in R1 no matter what, if you submit your completed app by Oct 17.
If you have to waive your interview because you aren't able to get to campus and there are no off-campus slots open, they could just ding you, but it sounds like it would be easier if they would just move you to R2. in which case you would be able to schedule an off-campus interview well in time of that deadline.