This is correct. Main shows are run live and then re-run later for the benefit of people listening in different timezones.
It was good for me because I caught up with Zane's opening show and the UK DJ (Julie?) show that I missed. I thought I'd turn it off when I heard the Ebro show again, but ended up listening through it a second time.
His back to back Otis and Otis Redding plays was what first sold me on B1. The second was the station-breaking four playthroughs of the Buffy theme song (no Fs given!). The third was St. Vincent dedicating Enjoy the Silence to an 11 year old with the coolest taste in music, then playing the full 12" version of Blue Monday that runs for 7 and a half minute. The fourth was Zane playing Calyx and Teebee in the opening show.
A worldwide always on station that needs to cater to every type of listener regardless of hour listening could easily have been the blandest, most lowest common denominator radio station there is. Instead we get Beats1, with an amazing mix of classic and modern tunes*, and eclectic stuff no mainstream station would ever play.
For me, who gave up on radio years ago, it's a revelation. I already purchased a full album that I discovered on it (Leon Bridges), and I have several more tracks on my wish list. I'll be tuning (no Zane, stop trying to make "tapping" happen) in often.