Balloon

Thanks for reply.

I use WordPress like knowledge collection and management system.

post_date is not set as it added and published on my system. post_date is set as the knowledge publish time from its original source.

For example:
ID post_date
1 2011-01-01
2 2012-01-01
3 2011-01-02
4 2012-02-01
5 2012-01-02
…
5000 2011-03-01

WordPress would display posts by post_date order on homepage. It’s OK.
But from admin dashboard we can only select date rang to export as XML.
In that case some newly added posts with earlier post_date would missing in exported XML.
What I need is export some newly added posts (and import to another system).

I found the same problem. If the search results more than one page. On first result page it shows posts limited by keyword but if you click the “earlier” link it opens a page contains unfiltered posts just like posts list on homepage. Keyword at end of query string disappeared.

It happened while permalink was not set to default value. So I couldn’t use “Pretty Permalinks” any more.