Shipping just doesn't work.

I have been trying everything to show flat rate shipping. Then shipping by zone and still nothing. Just recently I added the Subtotal Based Shipping ext to try that and still the total on the order doesn't change.

on localhost/shop/checkout_confirm
This is the bottom of the checkout comfirm page.
Subtotal Based Shipping $3.99 <- the text changed by the price is still the same.
Nevada Sales Tax: $0.31
Total: $4.30

I know I have made some changes here and there in the site but I have done everything I can to try and find what the problem is and I get nothing... Any ideas?

edit...
I just need to add a 2.50 delivery charge to every order. Can I just add this in the code? I would also like the checkout confirm page to say what the charge is for..

This one is nasty...

Have a look at all of the "calculate" extensions in your store admin and make sure that each of them has a unique sort order value. If they do not, then the previous duplicates simply disappear.

In addition, make sure that Total is last, subtotal is first.

As for a store wide flat fee, you will need a new calculate extension for that.

lol i have that last one as a mod as a flat rate fee...   15.00$

ok, i found the mistake. i added some code to give a message when the orders are not at least 10 dollars for delivery orders ( this is for a local restaurant ) where I placed this code was causing the issue and I simply moved my strings and if statements.

my flat rate is working fine now thank you for the responses.