If I understand you correctly, you want to have a chord on beat 4, a different chord on the and of 4 and a different chord on the first beat of the next measure. BIAB at present can not do that. There is a trick you can try, which is to expand your song by a factor of two and treat every two measures as if they were one. Then you can do it. Just adjust the tempo accordingly, and find another style to suit.

Bob Notes Norton has marketed 'expanded' styles to meet this need.

Again - this assuming I understand what you are requesting. You talk about an A in beat one of the following bar, but using the caret symbol means it will appear on the and of four in the preceding bar.

BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.