[time-nuts] Atomic Clocks are 3 seconds fast

[JULIAN TOPOLSKI]

I have two La Crosse wall-mounted atomic clocks,  one is set for local time (Mountain) and the other to UTC. They both are synchronized to WWVB and display the same time to the second (by eyeball). However when I tuned in WWV on 5 MHz (it's only about a 100 miles away so the higher frequencies skip over me), the announcements indicate the clocks are both 3 seconds fast. How can that be? Is it the effect of the new phase modulation? I thought it would not affect a clock that sets to WWVB.
 
Puzzled