I am glad you are applying to other schools in addition to RL. I can’t help you with the admissions letter/package issue. As for the OLSAT, I can only speculate that it is 1) a way of giving some applicants who did not prep well for the ISEE/SSAT a boost, and 2) a way to cross-check inflated scores from accommodations and/or over test prep. I believe the OLSAT requires about 20 minutes of preparation to be valid, though, and RL gives less than 1/2 that, so it is in that sense farcical. But at least it must be valuable enough from RL’s perspective — or they would not do it.
As an aside, what do you make of their lack of hospitality in the sense they were the only school we visited that did not supply coffee/tea, cookies etc. to visitors? I thought it was because their reception area was small, but my wife thought it was a deliberate message of asceticism on their part. All I know is that I was jet lagged: I really needed a cup of coffee, and was none too pleased that they were the lone school to not provide it.