Trying out the newest version i'm seeing many families with the same coat of arms. At least 5 with the red lion on white shield and the Salian dynasty has the same coa as the Piast (white eagle red shield). Is this just a random occurrence or can I fix it somehow?
Lions account for 10 to 15% of all arms during the middle ages. Gules and Argent are the imperial colours so it's also a very common association. Which makes Argent a lion gules or Gules a lion argent an extremely common design, specially in the low countries (imperial land, more than 20% of all arms featuring lions).
Piast and Salian dynasties have the same arms (as do many others like the counts of Burgundy). There's nothing to fix it's just the way it should be.