Edit that same transaction again. This time delete the line item with the Seed negative. Instead use the Other Asset button, (stock on the button). Select a new Account. Enter a description such as Seed holding account. Enter a negative matching the total seed purchase. Leave the offset to NONE and click OK. Update this transaction. Then you can also enter a new transaction for the Same Vendor and date, using the Supply button and select the seed variety for the negative qty amounts. Enter correct unit cost as a positive and click OK. The use the same Other Asset button. Select the Seed Holding account from drop down list and enter a positive leaving the balance zero. Click OK. Record this transaction. Now see if the inventory updated correctly.