When selecting a currency, the page will reload and currencies shown (currenlty the top 10 by default) will be shown with correct prices in the new currency.
But when you load more tokens, the new loaded tokens have the new currency markup but with USD values.
e.g. I have EUR selected as the currency in which I like to see the prices in. When I load more tokens, then their values are still in USD, but the markup shows as if it was in EUR.
Pics below: see the IOTA and Bitcoin Diamond prices. One pic with USD selected, other with EUR.