Both shows were broadcast for weeks prior to the start of the regular season, as part of CW's attempt to get viewers to watch their shows instead of shows from the Big Four networks. Consequently, if they run episodes straight through, they will run out of episodes before the end of the season, thereby showing far worse ratings during May sweeps, when ad rates are set for next year.
In addition, many series are showing reruns this week and next to avoid trying to compete against the baseball playoffs and World Series. Among the shows I watch: Bones is running two weeks of reruns; Criminal Minds, one; Fringe, one; House, one (earlier); How I Met Your Mother, one; NCIS, one; Terminator, one. In addition, other series have been or will be preempted over the next three weeks due to baseball, the debates, or the election: Bones, Simpsons, My Own Worst Enemy, Fringe, Eli Stone, House, NCIS, Pushing Daisies.