Plu perfect vs. past perfect
Why do they have seperate conjugations in the chart when they both mean past perfect?
what is the difference?
Okay, I have sent the corrections to Chris. Hopefully it will be a live correction pretty soon.
We seem to have a lot of problems with the names of tenses in the conjugator and even more getting them corrected. This has been brought up in past threads.
The pluperfect (pluscuamperfecto) in Spanish uses the imperfect of haber and the past participle of the verb. If you notice the conjugator erroneously calls the preterite of haber and the past participle the Plu Perfect. Most other sources call this tense the pretérito anterior.
And, yes, you are correct that in English they would both be past perfect as we only have one past tense where Spanish has two (indicative mood). (pretérito perfecto simple y préterito imperfecto without the auxilary verbs).
Another page from the site qfeed linked to that talks about usage: