Weird glitch where my game started on day 2

When I started the game for the very first time after buying it, it opened up to the beginning of day 2.

I don't remember what the menu screen said anymore but I do remember I clicked the first option. No cut scene and no day 1. I was pretty confused when the first thing the game showed me was "Day 2" but I assumed there was a lore reason we start on day 2. I only realized what I had missed when I watched a youtuber play it and saw the beginning cut scene for the first time.

Has anyone else had this glitch? For reference, I play on PC through Steam and had downloaded the demo before but not played it. Could it have skipped it because it thought I had played the demo?