If the people invading are marked as Watchdogs, they're from the covenant specifically about invading anybody who enters the swamp.

I think one was called watchdog of farron keep, another was yellow finger, then one named ark was obviously a player they kept dropping little things that would say hello and sorry. fourth guy rolled and fell down the ladder where you fight the two exile knights and the fifth guy got me in the swamp while fighting satyrs.

That place is busy.

Clearly they are ogres and your in their swamp.

Yeah the thing is if you're in the swamp killing things, after a point people who are Part of the "Watchdogs of Farron" Covenant will get summoned to invade you.

I always turn online mode off when I play DS games.