Some confusing lemmatization results

[chadananda]

Perhaps I'm misunderstanding lemmatization. Am I supposed to be getting these results?

this -> thi saying -> sail pleased -> pleas went -> wend this -> thi they -> thei haste -> hast mary -> mari saying -> sail

[Berkmann18]

I don't think those are correct either. I also see confusing ones such as:

coding -> ding
code -> de
design -> sign
deployed -> deployed (not deploy?)