Line 28 is right. But line 30 probably should be only 1,400 for the new baby. The IRS probably shows they already sent you the 2,800 for you and your spouse.
Double check your bank statements and Check your IRS account to see what they sent you (check both spouse's accounts if married)
Your Online Account | Internal Revenue Service
Request a trace for a missing third Stimulus payment
https://www.irs.gov/newsroom/questions-and-answers-about-the-third-economic-impact-payment-topic-j-p...Your Online Account | Internal Revenue Service
