Why is it [名前を書いたつもりだったが、**書いていなかった**ようだ。] and not just 書かなかった? [duplicate]

Question

What does the 'contuative' form add to the meaning in the sentence?

Answer 1

[名前を書いたつもりだったが、書いていなかったようだ。] So 書いていなかった is saying that "it was not written"

I.e. the speaker is saying they meant to write it, but the paper was blank.

書かなかった would say= I meant to write it, but I did not (write it).