Okay, a couple of theories on the repeated details... both of which have validity, and can both be going on at the same time.
First, like WH5 said, is that the whole story is so far from what was believed previously that it just can't be accepted the first (or 15th) time through.
Second, if so much that seemed true before was in fact a lie, how does one know that the present story is true? By hearing it lots of times, in different ways, that are all consistent.
As for the parental controls blocking access, that can come up because of any number of things. A poorly encoded parental control may have blocked the fashion blog because it made a reference to [bold]sex[/bold]y shoes. It likely blocks medical websites due to graphic content including gore, or sections on STD's or reproduction or explicit anatomical photos and such, or just hitting keywords in the filter.
If this is interfering with your education, you could point this out and suggest some sort of compromise like removing facetime and installing a keylogger instead of the parental controls.
Not personally a fan of parental controls, as a proper adult should not need them to behave appropriately. Eventually they come off or the computer is replaced, and you either are mature enough that it doesn't matter, or... Kinda like when people go to jail, they may not rob liquor stores while in jail, but when they get out, either they have learned not to, or they do...
He would be much better off in the long run if the two of you develop something to restore trust so that he knows he does not need to worry in the future than having something to enforce compliance now.
Just some random thoughts on this, check my tagline for details.