Yes those online sources come from exactly one man, his son Nosson. They are just copied from one place to the next - and even the spelling changes from book to book. Which is utterly confusing.
Book about his father spells it Kalushkove (he contributed the research) and the Godol book written by Nosson spells it Kaliskovkeh.
it also does not help that we are all Kamenetsky and yet several times he mentions the family circa 1890 as Kamenecki...I have no idea when it changed, but clearly in the 20th century at some point they all became Kamenetsky.