(That said, if you happen to have been born with an Aries rising, then they'll actually match up.)
Traditional rulers are different from the signs that actually rule the houses in your chart. Think of the traditional house rulers as the permanent, universal landlords of each house, while your house rulers are completely unique and based on your rising sign, which rules your first house, and the sign after that will rule your second house, and so forth and so on. (That said, if you happen to have been born with an Aries rising, then they'll actually match up.)