7: Silent letters in Egyptian names

So I don't think I have to start here, but I will.
The ancient Egyptian alphabet was different than ours. Here is a cute site that talks about how Egyptian names work. Here are some ancient Egyptian names:

• Tutankhamun, pronounced "toot in common." You know, the way Tutankamun would be pronounced. I am not going to debate the use of "u" instead of "oo" or anything, because some linguist knows what they are doing, but I don't think they are doing anything with that "h." Go ahead. Try to pronounce the "h."
• Horus-Netjerikhet. Again. Go ahead. Try and pronounce all of those letters. This guy's name can also be spelled Dsr, or Djoser, or pretty much any other way you feel like. Look it up. The list goes on and on.
• Serekh and Sekhemkhet, again with the "h," but now you must concede any hope that it affects the way the "a" is pronounced.
• Ptah, pronounced "Pitah" Ok, so I can see why they wouldn't want to carve an extra letter into stone, but these days we are talking about hitting one more key on a key board when typing this guys name. If we are willing to type out the 17 key monstrosity up there, why does this guy not rate the time to type an "i."
• Nakhtnebtepnefer. I'll stop there.

Thing is, there is no reason we need to have such crazy spellings for these names. The modern spelling of these names is, well, modern. Someone read the hieroglyphics less than 200 years ago and then wrote down his best approximation of the name in his own alphabet. This alphabet is not perfect, but it has an only slightly stupid list of rules. None of these rules say "and every 3rd letter you must have an 'h'." or "consonant Tourettes for all!"
Ok, maybe they have trouble writing a sound that ancient Egyptians used but we have long since forgotten, but I cannot believe that this is the case when they write "khtn" up there. Something is being pronounced that is not written or something is written that is not pronounced. For that guys sake, I hope the latter.