Why the spelling of two Leslie?

You're likely asking about the spelling of the name "Leslie." It's actually just one word, not "two Leslie."

The spelling of "Leslie" is generally consistent. It's a name of Scottish origin, and the spelling has remained fairly stable over time.

Perhaps you are thinking of a specific instance where someone might have misspelled "Leslie" twice, or perhaps you are looking for a different word entirely.

Could you please clarify your question?