Contact change from 8.6 to 8.5 and dia change 13.8 to 14.2 but they don't sit right?

The lens you are wearing currently is a bit steeper, or rounder than the Focus Night and Day. The larger diameter makes them rounder/steeper still. Ask them to try the flatter 9.0 size, it may help. Also, make sure you are putting them on inside out....this makes them fit improperly and pop out.....