You have to read the whole section to get the full gist. Basically Finn has a rather small gateway ... Small enough that Harine's stuff is being taken through by porters no cart. Then he starts apologizing to Rand and says "I've never been exceptional at gateways, not like Androl" he starts to elaborate "I had to...." And Rand cuts him off and tells him he followed orders and essentially to shut up. Flinn is obviously bothered by his lack in the gateway.

As for Logain, didn't you ever do a math problem in school and get the answer correct despite doing the work wrong? Whenever that happened to me I got docked points for essentially getting the answer correct by luck rather than from the real reason. Logain could be in for a nasty shock if he doesn't pay closer attention.