Assassin's Creed 2, No more Codex pages on map but still need. Stuck on 14

[Pick-Ah-BOO]

sequence!!? Hi guys... OK.. On my screen there is Codex Page 23/30 and.... I have gone through all 4 cities but got no codex sign on map. So there r no where no more codex pages to get. I got x16 Decrypted Codex pages. I really don't know what to do. I think the thing I did wrong was going in Codex pages' location n getting them very before sequence 14 n at that time nothing would happen, no codex page in inventory. Guys PLEASE HELP! I really don't know what to do. Been playing so hard this game n reached sequence 14 in just 3 days.... Played vvv much.
I have all the viewpoints guys + done manyyy side missions.

 

[blacksheepdj]

Also, if you have all the viewpoints, make sure you aren't carrying around some undecrypted pages!

 

[Tucker Brown]

make sure you have all the viewpoints. they won't show up if you don't. that's the only advice i can give. sorry