Student Worksheet Line 18 Adjustment Randomly applied?

Now that the Education Expense entry issue in TT has finally been fixed I was able to enter all my 2 sons Education Expenses. However, even though I have valid expenses for both of them to cover all 529 Distributions I made, TT is still trying to tax me on part of the distribution for 1 son. When I look at the Student Worksheet, there is a completely random $10,000 that was entered In Part VI, as an Adjustment on Line 18 "Used for Credit". We receive no education credits as we do not qualify for them based on income. Can someone explain where the mystery $10,000 is coming from? Because of this TT is trying to get me to pay thousands of dollars of extra tax on my 529 distributions.

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