STEEM is worth around $1.50, so you will get paid out proportionally less than SBD. If you do the calculations you will see that you are getting paid the proper amount. You need to use the current price of STEEM in USD and then subtract the ~25% that is paid to the curators of your post Hive account@jonasthomas. You also need to take into account whether you have chosen the 50/50 payout or 100% SP payout. The system is definitely giving you the proper amount. Hope that helps!