I don't think the difference in the two sides is significant enough to be noticed at first glance so it is not likely that those people have chimera. Remember, it is a case where a twin swallows another one so the difference can't be much since they are twins. Even if they are only fraternal twins, the disagreements would help to ensure that the two individuals in one would meet each other halfway and ensure the lopsidedness won't be noticeable.

I appreciate how you always stop by and for your comments. All the best, man!