Why "置いておいて" Is Correct, Not a Mistake

The correct standard written form of the phrase is "置いておいて," not "置いて置いて" or "置いといて," according to a recent article. The repetition of "おいて" is grammatically correct, not an error. The article explains that "置いて" is the te-form of the verb "置く," while the following "おいて" is the te-form of the auxiliary verb "ておく." This usage dates back to the 8th-century Man'yoshu, where a similar construction appears, and the double repetition of sound and meaning makes the correct form seem questionable. The colloquial "置いといて" is a common contraction of "ておく," not a Kansai dialect as many believe. Its earliest recorded use appears in the Edo-period work "Ukiyoburo" (1809-1813), showing it was spoken by Edo townspeople over 200 years ago.