I just recently bought the economy plus membership. On the flight that I took this weekend I showed up at airport and four of the people that I moved up to economy plus where now in regular economy seats($900 to move myself and 6 people on my reservation). The United system has no way to tell who has a membership .Therefore there is nothing to stop My party from being moved from United plus seats when there is a plane change .

As a matter of fact this weeks flight was not changed and I am now moved to an economy seat. I got that corrected yesterday but am I supporter check every 15 minutes? This is crazy. I am flying the next 6 weeks and want to avoid this. Any suggestions?

Thanks.