In response to your question, the answer is "Neither". I believe that in a close election, legitimate polling companies utilizing different philosophies of survey research, and carrying out frequent update polls which are going to pick up every attitudinal hiccup, and as a result, some polls are going to show Romney ahead. Are there illegitimate pollsters? Of course there are. But your allegation implies that all of them are, and are being intentionally rigged. And that's what your allegation lacks evidence of.
Take a look at the other replies to this thread, and your replies back. If you're the only one who "understands the math", perhaps there's something wrong with your conclusions.