cant split wages into three separate bank accounts??

I have an employee who needs his wages paid into 3 bank accounts. I havent had any trouble until i had to change one of the accounts. Now it will only split over 2 bank accounts, for example net wages of $944.50 to be split like this.

1st account   - needs to have $275 into it

2nd account - needs to have $75 into it

3rd account - balance to go into it. $594.50

its putting the $275 into the first account and then putting the balance of $669.50 into the third account.

Ive tried swapping them around - 1st account the $75, 2nd account $275 and balance into third account.

It just wont do it now, and i have no idea why not. Can anyone help please? thanks