G'day Mate,
No wonder you are having trouble, they are NOT CA hinges, use 30 minute epoxy to secure them, remember you must have a double bevel on the control surface, to allow it to move, & you should have the hinge pin centre line on the exact centre of the hinge line. Meaning you must cut some of both sides away to allow the hinge centre section, the thick part, where the pin is, to be inline with the point of the bevel, that is the pivot point of the hinge.
When I use these hinges, I fold them together, & dip just the centre section, where the pin is, into some melted industrial while grease, it will get into the hinge pin joint, & stop the glue from sticking up the hinge. DON"T GET ANY ON THE FLAT PART OF THE HINGE.
Do it with clean hands, let it cool on some paper towel, & then mix your epoxy, & use a thin spatula, I use an old butter knife, ground square at the end, to push some epoxy into the slots on one surface only, & some on the hinges, Eg, an aileron, mark exactly where they must fit, & push the hinges into the slots one at a time & line em up square, leave em to dry, & if you have enough time you can do the other aileron, & so on, don't be in a hurry, & it will work out fine.