San,
There are two different concepts here:
1. The “exchange rates” admin section loads exchange rates from other exchanges and services. This is for the purposes of displaying amounts in different currencies.
2. The “Exchange extension” is a plugin extension to allow your users to perform trading on your site, and is totally unrelated.
In the Exchange extension, when you click on an amount or exchange rate in your orderbook, order history or market history, these values get transferred to either your buy or sell input form. When a market is loaded, the default buy and sell rates are set to market values, but only if there is an orderbook. Could it be that you are testing with an empty orderbook?
Can you please describe exactly what you did and what happened?
Thanks
kind regards