I thought many tried to return, but apparently I was wrong. And they couldn't know they were due for expulsion so I don't think it was that insane to return. That might even have been the reason some of them didn't bring much belongings when they initially left (those belongings they were later denied from reclaiming by the Poles.)
Context. The Poles shipped into former German territories often had no belonging of their own since they had leave everything in USSR. In many cases, such as my grandfather, Poles were ferried directly from Soviet gulags, even with gulag-clothes on their backs.
I know that nothing justifies theft, but we are talking about post-war years and Poles survived the war were people who vergd on famine and just saw some of the most horrific things in the whole history.
What was the reason those Germans left in the 1950s? Expulsion? And why were they allowed to stay? Was it because they were catholics like with those Germans who were allowed to stay around Oppeln (and who still are there I think)?
They were allowed to stay because in many cases they were Polish speaking and of Polish descent (Silesians, Mazurs etc.). They left when they realized that Poland was to become a Stalinist hellhole.