An interesting double-standard.
-Italy fought alongside the Axis powers; it could be said Italy started World War 2 by establishing the first major fascist government. Italy fought wars of aggression against Albania and North Africa. Contrast this with Romania, which was attacked and invaded by the Soviet Union, and was fighting a defensive war for the liberation of territories annexed by the Soviets (Bassarabia and Bucovina).
-Italy, like Romania, switched sides in 1944, though Italy mainly did it because they were occupied while Romania did it because it was no longer in its interest to fight a losing war. Italy was an occupied country when it switched sides. Russians however did not enter Romania when Romanians formally told the Germans "you have 15 days to get the
out." Antonescu had set up a fortified defense of 2,000,000 troops ready to fight to the death against the Soviets when his government was overthrown.
-Interestingly, Italy was recognized as a cobelligerent by the Allies, and treated as such. Romania on the other hand, which contributed far more troops than Italy did to the Allied war effort (18 divisions) and lost the same amount of men fighting alongside the Russians as they did fighting against them, was not recognized as a cobelligerent. Romanian troops, acting independently of Russian troops, liberated over 1,000 villages on the Eastern Front, and fought all the way to the Tatra mountains.
So, why was Romania not recognized at Yalta? "How would you feel about 90% control of Romania and we get 90% control of Greece?" The famous words of the fat bastard himself. The Allies basically took their "liberation" by the Russian effort (the Russians had paid a far greater price to win the war than any other Allied nation) and made their compensation via the labor and resources of all Eastern European countries (Poland included). You literally paid with what you did not have in the first place. Thanks for 50 years of hell; may we one day return the favor.