掲示板 Forums - incorrect kana type frequency (hiragana vs katakana)

I have noticed that some words have the incorrect kana as in hiragana vs katakana usage when being quizzed.

this is a separate from whether or not kanji is more popular via JMDict than the kana form.

e.g. in master schedule for beginner japanese, katakana shows as かたかな, but カタカナ frequency is 70%, 片仮名 is remaining percent and then very small percent is かたかな.

i just come across another word like this, カニ for crab. on renshuu card, it defaults to the hiragana again. kanji is under 40% frequency with 蟹, but when written using kana it is almost exclusively written as カニ rather than かに, but it shows on the card in hiragana.

i am not sure if there is something on backend with frequency calculations that defaults every time to hiragana for these types of words, but that might need to be look into. for exclusively katakana foreign words that dont have kanji, they appear correctly in katakana. i am reporting cards like this, but I am seeing it quite a bit so there might be something that needs to be looked at as in general way in which these cards are being processed that have kanji components.