The IRS site is confusing ... the only thing on that "list of possibilities" that applies to you is the last one ... they corrected your "math error" which is what the IRS refers to when you have the wrong amount on line 30 of the form 1040.
So the change is $2200. Did you enter the correct amount of stimulus you got in advance in the program ? If you got it all the line 30 should be zero or blank.
