"The general rule is that unrecaptured section 1250 gain (subject to the 25% tax rate) must be recognized before any other capital gains (subject to the 20% and 10% tax rates). This rule is applicable to all installment payments received after August 23, 2000. "

Your prior return was doing it wrong. You're gonna have to override if you want the current year return to do it that same wrong way.

Alternatively, what you have is a sale of multiple assets, where only 52% of them had 1250 gain. In that case, you can split it into two separate installment sales, or you can override.