Hello,
This is certainly not normal behavior. I am attaching a screenshot of what you should be seeing in this case.
Before completing your order, you get a dropdown, showing you how much you would pay in each available cryptocurrency. This is calculated using the exchange rates on the system.
Can you please email me a screenshot of that dropdown?
Also, can you please check if the exchange rates on the currencies that you made available are set correctly? You can do this in the admin screen for each currency.
Normally the exchange rates are kept up to date with data from CoinGecko. This is only done if you have set correctly the CoinGecko ID on each currency, and if the cron jobs are running.
Looking forward to your reply.
with regards,
Alex