is that because it appears that the Eqyptions had a couple of extended periods of their own "Dark Ages" where there are few records - and thus missing kings?
Great tagline.
One reason for the king list problem is that even the original (by Manetho, which exists only as copies in other ancient writers) was made very late in pharaonic times.
Another reason is that the list was itself a political document.
Still another reason is that it was based on the New Kingdom inscription (found even today in a temple of Seti, which was completed by his son, Ramses / Ramesses II), which wasn't necessarily well understood by Manetho.
Still another reason is that the inscription was also a political document.
Of course, the main reason is, the Exodus didn't take place during the New Kingdom. :')