P*R or B*N?

State P administration is currently on the rocks. There have been 3 people's reps declaring that they are going on their own until the P*R which formerly garnered 31 seats now reduced to 28. That is actually the same number as B*N, but the future Prime Minister declared that the 3 switching sides reps has sworn loyalties to B*N and that the P*R government should step down immediately and let B*N form a government in state P.

So the maths is 28P*R + 28B*N + 3independent
Wait a second. Did you say "independent"?
So what's with B*N declaring a B*N government in state P?