is it normal to have more than one kin from the same canon?

Its not particularly normal or abnormal. I always tend to advocate for heavy scrutiny when you think it may be the case, because it seems easy to get mixed up about. Examine why you think you’re both of these people.

If your beliefs fall more on the psychological front, examine your feelings and if you really feel like you ‘are’ both these characters, or if you’re just feeling close to one of them because of feelings the other had, or something like that.

If your beliefs are more on the spiritual front, ask yourself how you feel both of these characters came to exist as one person. Soulmates born into the same body? Some kind of incident where they were merged in ‘canon’?

I don’t think there’s anything inherently ‘abnormal’ about having two kintypes from the same source, but I do think its something that requires close introspection.