FWIW, I just today found an icky typo (two "the"s in a row) in one of my SOPs. Before now I'd been religiously avoiding even looking at any of them, so... the only reason I was reading this one again? To revise it for a fellowship application, because somehow the school I sent it to actually wants me to attend.
I still reallyreallyreally wish that I had been less punchy (or whatever) and caught the typo before I submitted. But anecdotally, I guess some admissions committees are forgiving of these kinds of finger errors in otherwise solid pieces of writing.