No, they don't look at anything else except your UAI and first year results. No statement, no interview. Two criteria, equally weighted: UAI and first year results.
To be really honest, I'd say you'd have to perform exceptionally well this semester to have a chance. I know of people with a UAI of more than 97 and distinction averages who have not received offers of Usyd law (although many were offered it at UNSW). But it changes every year, so who knows?
I can't explain why people above / below NRSL cut-offs received admission or didn't. My only suggestions are that the NRSL cut-offs are misreported (I was under the impression that Universities kept them confidental) or that the raw GPA of an individual is different to the UAC converted GPA. Because different institutions use different grading systems, UAC does convert results. How they do this and to what extent - I have no idea.
All you can do is aim on getting the best possible results for this semester and hope for the best. Good luck.