First post here, but I'll like to say thank you for all the information you've given about IG, really helps out a noobie like me

. But I do have a question.
So recently I started following high engagement accounts and high following accounts in my niche. I saw a smaller account with the same niche like 2 of my photos. I ignored it, and the same account liked another 2 pictures a hour later, and again I ignored it. 20 hours later the same account (which i have not made any interaction with it at all) followed me, and liked 2 of my pictures again, so I would like to ask,
1. How did he find my account at the start, when i was following all those engagement/high following accounts, without me having any interaction with him at all.
2. Do you know if there's a setting on FL or any bot that allows him to like 2 pictures, then 20 hours again like another 2 pictures without the user even interacting with the likes.