The BlackBerry will show all of those folders but not all of the email inside of them. Only new email filed there or sent there by a rule will show up. You can try to copy them to another folder and maybe move them back. Also make sure that folder redirection is enabled for that folder. Here are some docs, hope this helps
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blackberry.com/knowledgecenterpublic/livelink.exe/fetch/2000/8021/728075/728850/759563/How_To_-_View_Cabinet_folder_items_on_the_device.html?node id=1219858
blackberry.com/knowledgecenterpublic/livelink.exe/fetch/2000/8021/7919/8125/How_To_-_Enable_Folder_Redirection_with_Inbox_sub-folders.html?nodeid=1061227