Line minimum amount - Modifier setup issue

Hi,

I have business requirement as follows and the order Line minimum should be $14,000

0 - 750,000   @ $ 0.125

750K - 1.5M   @ $ 0.01

> 1.5M   @ $ 0.008

So the Modifier was created with

Modifer Type = Price Break Header

Volume Type = Item Quantity

Break Type = Point

Since we required the line minimum of 14,000 

the price breaks were set up as

0       -   1.4M            Lumpsum   14,000.00

1.4M -   1.5M             New Price          0.01

1.5M - 99999999999 New Price          0.008

it works fine for the first two tiers but is not working for the third tier

because say line Qty is between 1.5M to 1.75M the amount is less than 14,000

eg 1577278 x 0.008 = 12,618.22

but we need it  be $14,000