BUDAPEST, Hungary — Thousands of refugees surged into a Budapest train station Thursday when police ended their two-day blockade of its entrance, but the surprise move produced only a new swirl of confusion and anger as some refugees found themselves tricked into taking a train to a Hungarian camp for asylum seekers. [...] the train soon stopped northwest of Budapest in the town of Bicske, where dozens of riot police stood waiting to escort the human cargo to one of the country’s major camps for asylum seekers — an overcrowded, open-door facility that many of the refugees already had left days before. The asylum seekers refused to leave the train, and refused offers of water and food as they demanded instead to be allowed to leave Hungary.