price will not change on line PO

Hello,

Could you anybody explain me this behaviour:

1) For item XXX and suplier YYY crate  Quotation with price 3800 . To line (with item XXX)  create 2 price break:

 A) quantity 2 price 37000

quantity  1 price 38190

2) Create PO for suplier   YYY and item XXX with qty 2. To item is automaticaly assign price  3800  

3) Save PO. For update price I use button „catalog“.

 

In catalog I can see two lines from Quotation and one line from BPA

 

 

When I select some of two lines from Quotation price on line PO remained still the same 3800.

Do you anybody know why the price not change ?

Thank you

Petr