Difference between 'was to . . ' and 'was to have+p.p

What is the difference in the meaning between following sentences:

> 1. John was to have picked strawberries yesterday but the downpour made the field too muddy.

> 2. John was to pick strawberries yesterday but the downpour made the field too muddy.

(Source: modified example from BBC )

http://www.bbc.co.uk/worldservice/learningenglish/grammar/learnit/learnitv103.shtml)

I've read in Learn English BBC that the form "was to" and "was to have" is used for past plan which wasn't fullfiled.
But What I haven't understood is that these form look similar to me. I'm in a dillema which one (was to, or was to have) is used for past plan and which one is for unfullfilled past plan.

So, what is the differences between the construction *was/were to ...* and *was/were to have + past participle*?

I would appreciate for your helpfull answer