Capital gains from LLC K-1 for personal taxes

We have a gain/loss form sale of a home via an LLC K-1.  Box 9a shows the LT gain on the sale, but I am also asked about the sale price and cost basis on an earlier page for the K-1.  If I enter information on that page and box 9A, I seem to be taxed twice for the transaction.  How do I handle this properly?