That's because of how you coded state source wages.  When you are on Screen 10 and enter wages for Box 1, you should hit Ctrl-E.  You will need three lines for this.

1. $50,000 with US for State and Code N for Source;
2. $50,000 with NY for State and Code S for Source; and
3. $20,000 with CT for State and Code S for Source.

This will make sure the other $50k coded for NY doesn't flow through to CT and vice versa.