Deductions & credits

I selected yes that I recieved both payments and was asked to enter amount of 1st $1700 and 2nd $1200 payment which I did but was given a credit of $500. I did this 3 times to make sure I didn't select something wrong. I recieved the same outcome each time. So I thought maybe there was an additional credit people were given that I didn't know about. I just got a notice from the IRS That my refund is less because the computer input a credit I did not qualify for. I am still getting a refund but worry for those who will get a notice that they owe because of this issue. I submitted mine on the 7th and another person on the 14th.