I am not surprised at what you found, but am most definitely relieved to see that it has been redone properly. Now you have peace of mind knowing that addition is safe and should outlive you.
Re: "...that addition is safe and should outlive you".
I was talking with the GC about something or other yesterday when my father asked, "What about those mounts on top of the posts? Aren't you concerned about rust?" The contractor said something to the effect that were "very heavily galvanized", and should last for 25 years or so.
I turned to my dad and said, "Hell! I'm 60, and I'll be pushing up daisies in 20 years, so what do I care? That's the next owner's problem!"
To which he responded (he's 90, recall): "Well I won't be around for it either, that's for sure!"