Ah the fun of old homes, years and years of DIY hack jobs with wildly varying quality lol. In a similar boat with my home, slowly trying to improve things as they come. I just replaced all the outlets in one room and found just 1 was on a totally different breaker - luckily I was checking them individually instead of assuming the breaker took care of everything.

But actually, yes - https://makezine.com/article/workshop/metalworking/understanding-240v-ac-power-heavy-duty-power-tools/