2012 6 speed won't downshift into 2nd?

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I purchased a 2012 Mazda 5 with a 6 speed today, took it for a very brief test drive. Went through 1-6 just fine. On my way home, I tried to downshift to 2nd multiple times and it will not go into gear. I was originally thinking it must be some safety feature, now I'm not so sure because I think I'd have found some Google results. Why would it go into 2nd fine from first, but not third into 2nd? Can anyone offer any advice? Thank you