In English, three
of a type or more commonly written as three
of a kind means N (in this case 3) of the same type. If something would accept items of any kind then it would say
of any type as opposed to the current writing. The "of a type" isolates a single type and implies that others aren't accepted.
I do understand how it may be confusing and one could be trying to complete the quest in a wrong way, but there is no issue with the quest itself. Maybe post that as a proposal in the
Ideas and Suggestions forum and hopefully the wording will be changed in the future. Usually we would handle text-based issues through the
Text-related Errors forum but as mentioned there is technically no issue here. It's more of a suggestion to make the wording more understandable.