Originally Posted by
LEONIDES
This has happened to me multiple times, on flying the SPI-ORD route on those cheap Canadair buckets that Skywest operates. On my last hop out of SPI, I had to be move from row 1 to the back of the plane. This was on a Wednesday, and the plane was only half full - which explains why weight balancing was a problem. It was only a 30-minute flight, so I did not care.
It has happened to me countless times on small aircraft. Never on a mainline aircraft, so I can understand why the OP might have been surprised.