Missing Pages in protected content list

I saw another thread on this and i appear to be having the same problem.
I have over 500 pages i am trying to protect probably about 90% of them. The easiest example would be the dictionary.

It comes up with the right page count, but when i go from page 1 to page 2 etc most of them are empty or only have a few entries. Thus far the only page from the dictionary i have been able to add is D that comes up in the listing. If i search a letter, for example A.. i will get a huge list and can go through and add those then have to be individually added as the batch add throws you out. only 16 pages out of about 500 can natively be found and the batch add doesn't seem to work at all.