Words with dashes (-)

Just installed this Plugin – So far I really like it.

I started out describing words like “C-Vitamin” and “K-Vitamin” etc.
However, after only adding the first three Vitamins, I see that the K-Vitamin shows both the description for C and K-vitamin.

Could it be that it is the dash in the words that somehow confuses it?
Or is it something else?
(I did check for synonyms and none of them are the same).

+ a suggestion
One suggestion would be to make it easier to nicefy the look and feel on the “shortcode” page. I.E. make breaks between the words, the descriptions and possibly some choise of pre-bullet-points.

https://wordpress.org/plugins/explanatory-dictionary/