peregrina:
yes but the past perfect is used to state that something is already in the past when discussing something in the past tense.
So to use Kat's example "She made a post to Mudcat today; she had made many previously."
She made a post today (in the past). At the time that she made that post she had already made many previously.
The second sentence relates to an action already in the past at the time of the first sentence.