Hi Mark,
I haven't experienced this myself. Is this still the case? Also, your phrasing is a little confusing. Are you saying that if the KJV text is BOTH primary and parallel it's even and aligned?
Also, does this happen in various books of the Bible or just one? Have you also tried any other two versions side-by-side to see if it's just the KJV?
Also, if this is still happening, what version of the app are you using?
Regards,
A-ron