do you lose benefits of templates if you no longer qualify for it?

[newguydude1]

You don't actually get the SLAs of your morphed form, though.

ok so my line of thought is
pao into intelligent undead
gain the spellstitched template. i get the slas because i didnt pao into a spellstitched undead. i pao into normal undead. spellstitch is an entirely independent effect unrelated to pao.
i revert back and keep the spell stitched template because theres nothing in d&d that says you lose your template when your race changes. so id be a spellstitched changeling.

i dont think it works honestly, but im hoping someone might say im right. long shot i know.