For reference, I fixed this by patching the same .ffttext file with FFTacText .457. I can edit in .482 but it seems I need to use .457 to patch things after I finish doing my edits. Either my FFTacText glitched the fuck out from the fact I'd basically rewritten everything inside it, or there's an error in the writing-to-game procedure.
Also, unrelated, not sure if this is true for other versions of OrgASM, but with .482 OrgASM, once I apply ASMs to an ISO, it won't allow me to choose new ASMs and apply them to the ISO without restarting the program. Visually, I can click the boxes, choose a new ISO to patch, etc., so it looks like it works... but if you actually check the ISO, no edit has been made with your new choices.