NY Nonresident IT-203, unemployment allocation and IT-558 form

[kcaegis45]

I am using TT Deluxe.

I reside in NJ

I am filing the NY IT-203 nonresident form with itemized deductions with $2500 charitable contributions.

I received $6000 NY unemployment.

I am filing standard deduction on my Federal and used the $300 charitable contribution.

When I filled out the NY IT-203, I allocated $6000 unemployment amount to NY (Line14) and the $300 to NY (Line 18) also.

So the $6000 was included in Line 17 and the $300 was deducted from Line 17, all resulting in Line 19.

But then Line 19a increase the Line 19 amount computed by form IT-558 of $6300 which is the unemployment and charitable contribution amounts.

I can see why IT-558 needed to add back the $300 amount as it was deducted earlier and I am not entitled to the $300 deduction. 

But why is it adding my unemployment of $6000 again into Line 19a. I have already allocated the $6000 unemployment in Line 14 which is already included in Line 19. And now Line 19a is adding the IT-558 amount which also has the unemployment amount of $6000 to line 19.

It seems to me TT is double counting the unemployment amount. 

What am I missing?

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