I tried searching for this in past posts, but was not sure what to look for... My brother and I want to go to Washington D.C. in a roomette, but we will be travelling from different cities. Me from Chicago, him from Topeka. He will take #4 to Chicago and we'll both get on the #30 to D.C. The reverse will be the opposite. We want to each use our respective points for one direction of travel. Will there be a problem if he boards in Topeka without me and on the return, if I get off in Chicago, can he transfer to #3 without me there if it's my ticket purchase?