I'm trying to put up a wall-mounted wine rack. My house is terraced and the wall on which I'm trying to put it on is the one between the two houses. On the internal side of the wall there is plasterboard and then some insulation.

Initially I thought that this would be the typical 1/2" thick plasterboard (as it is for the internal partition walls in the house) but it turns out it's 1.25"-1.5" thick. After closer inspection I noticed that there is a 1/2" thick plasterboard and then another thicker sheet of plasterboard (?), so the two sheets together end up being 1.25"-1.5" thick.

I have already put a hollow wall anchor which is for 1/2" thick plasterboard, so I understand that the metal sleeve will have expanded into the second, thicker plasterboard. Can this cause any kind of problem? Is it safe to continue putting the rest of the hollow wall anchors the same way?