What exactly is perplexing? It was already noted that the pre-war borders were the guiding principle. All of the exceptions were done either to accommodate major Cold War powers or to weaken the major Axis powers. Neither Greece was a Cold War era power player nor was Albania a viable threat to anybody, thus the guiding principle was applied. Considering how the Polish borders and post-war affiliation was handled, I don't think it is reasonable to complain.The thing with Albania is, it was not Albania's "will" to keep Greece from the Greek inhabited areas of southern Albania after ww1, but ITALYS will. But after ww2, with Italy on the wrong side and the allies no longer needing to satisfy them by keeping Greece out of the western gateway to the Adriatic (Epirus), it is perplexing that the Allies did not turn over this land, especially since it was land that not only Greeks lived in, but Greeks bleed in and won battles vs. the Axis in.