Hi Celia,
The confusion is coming between Dumbartonshire and Paisley.(nothing to do with each other)
My grandfather was in Auchtenorlie House Paisley(as a coachman) which is at Seedhill, Paisley on the grounds of Ciba Geigy and the Seedhill Finishing Company. I think the one in Dumbartonshire was much more granduer!
Auchentorlie in Paisley (I have the census) was owned by the Cattanach family who were involved in the whisky business. After their deaths, according to my aunts memory it was taken over as a "poor hospital and home" Your best bet is getting in touch with Paisley Library as Auchentorlie changed many times after a private dwelling.
Liz