Re: 袋 used on its own

It’s “doi6*2” when used in "一個袋" but it’s also true that “doi6*2 is often used at the end of multisyllabic words”.
I don’t think it necessary to specifically mention on the Additional Notes section the single case of using 袋 on its own.
Furthermore, there are always exceptions to any Cantonese phonological rule, and tone changes have most of the exceptions.
That is why nearly all Cantonese dictionaries (except CantoDict) usually do not list tone-change readings.