RSU cost basis adjustment

I had 20 RSU sales in 2019.  Of course, initially the cost basis isn't accounted for when you sync to your investment account.  As expected as I entered the cost basis for each RSU sale the amount I owed went down.  That said, on the last two transactions the amount I owed did not go down at all.  Did something change in the tax code this year because in the past it went down after all my entries?

 

TIA