The price listed as the "best price" is converted from CHF to a target currency, even though the site currency may already have been set to the target currency.
The case in point lists a site.country of CH, with a site.currency USD, and a bestprice of "2.95" for an option. As it happens, the HKCCP shows the price in USD as 2.96, implying the 2.95 is getting converted to USD as if it is CHF.