HSV-1 is usually transmitted from oral-to-oral contact, while HSV-2 is usually transmitted from genital-genital contact, but both forms of HSV can infect the genitals, anal area, mouth, and IIRC around the nose and eyes in less common cases.
Have I always had HSV-1 as I always had cold sores (oral herpes)?
Actual cold sores are oral herpes, yes, and are usually HSV-1.
Genital HSV-1 is becoming more common in recent years, as I recall, in part due to more oral sex.
It's relatively rarer for someone with oral herpes to have the same strain of herpes infect their anogenital region or vice versa, but it does happen. Of course you can also have oral HSV-2 and genital HSV-1 as well.
As for what it means, it means you're going to have to disclose this to partners going forward and refrain from sex during outbreaks. There are some drugs that help control herpes and will reduce the risk of you transmitting the infection to partners.