Looks like an anchor line-up and shift adjustment downstream of the ending of World News Round-Up Late Edition.
0400-1000: Debbie Rodriguez (starting one hour earlier)
1100-1300: Steve Kathan (no change)
1400-2000: Jennifer Keiper (replacing Cami McCormick's 1400-1800 shift)
2100-0300: Overnight Anchor (starting two hours earlier and ending one hour earlier)
I guess this means there are only four anchors in a 24 hour day. So does Rodriguez or Kathan anchor the World News Roundup at 8 a.m. Eastern? I think he does it and she does the standard 8 a.m. news for stations that don't want the long-form WNR.
I can remember when CBS Radio anchors only did three newscasts a day. They often alternated hours. Dallas Townsend might be at 6, 8 and 10 a.m., Charles Osgood at 7, 9 and 11 a.m. They also used TV anchors for a radio newscast or two, such as Dan Rather, Richard C. Hottelet, Charles Collingwood and Douglas Edwards.
I wonder about the other weekend hour-long shows that some CBS affiliates use. The list was...
CBS Weekend Roundup with Allison Keyes (now cancelled)
Jill on Money with Jill Schlesenger
CBS Eye on Travel with Peter Greenberg
CBS Eye on Veterans (not sure of the host)
Ed O'Keefe had done a one-hour weekend interview show but that was axed a year or two ago.
And there are two five-nights-a-week shows:
The Takeout with Major Garrett (This is also a TV show on the free "CBS News 24/7" streaming channel.)
CBS Eye on The World with John Batchelor (This had been three hours each evening but I see KIRO-FM Seattle now only runs one hour.)