so you mistyped? you didn't imply that the Nazis were still running Treblinka in Sept 1944, after the Soviet Operation Bagration had steamrolled the Nazis in eastern Poland where all the AR camps were, meaning it was Auschwitz next in line to be liberated, not Treblinka way back behind enemy lines? Just checking, because I know you know WW2
As for Zabeckis, i checked the wiki...
After the war, Ząbecki testified at the trials of German war criminals, including SS officer Kurt Franz, and the commandant of Treblinka extermination camp, Franz Stangl. His incriminating evidence against them included original German waybills produced by the Reichsbahn, which proved that the "Güterwagen" boxcars crammed with prisoners on the way to Treblinka extermination camp, were returning empty. Ząbecki secretly stole a batch of waybills in 1944 from the control house to serve as physical proof of the massacre. From July 1942 until the end of war, Ząbecki regularly delivered his reports about the Holocaust trains to the Polish government-in-exile.
So yeah, nothing about transfers to Bialystok or Lublin. Just full loads of Jews being sent to Treblinka, empty trains coming back, because they were dead (no other explanation, because you couldn't keep 7,000 people in that tiny camp, let alone the minimum 720k sent to Treblinka). So this really doesn't help your case, it helps the official story, and reality