Not a BUG ... the Jan 2019 payment for the 4th quarter 2018 estimate + the April, June & Sept 2019 estimates go on the 2019 Sch A ... the payments made DURING the 2019 tax year go on the 2019 Sch A.  What you are missing is the 4th quarter 2018 payment made in Jan 2019  IF  you made such a payment.   ALSO any 2018 balance due payments made in 2019  go on the 2019 Sch A ... go back to the Federal Deductions section to enter these payments if you have not yet done so.  

Now on the state return ... the 2019 payments (made in 2019 & 2020) will go on the 2019 return.  

Where do I enter my estimated tax payments?

https://ttlc.intuit.com/replies/3300049

To enter, edit or delete estimated taxes paid (Federal, State, Local) -

• Click on Federal Taxes (Personal using Home and Business)
• Click on Deductions and Credits
• Scroll down to Estimates and Other Taxes Paid
• On Estimates, click on the start or update button. Be sure to pick State.

Or enter estimates paid in the Search box located in the upper right of the online program screen.  Click on Jump to estimates paid