Does anyone have [problems with glass doorknobs??

we have glass doorknobs in our apt? when you turn them, nstead of opening the door…it just keeps turning. we have to takeit apart just to open the door. also they break very easily. we were told we had to buy the same one at home dept so we didnt have to drill a huge whole for regular ones. we installed them on one door today and it does the same thing as the old ones? are we doing somethign wrong or is it just the doorknobs???? help