Indexing after restart

Have WDS 3.01 on Windows XP Pro SP 2. Indexing local disk and 2 Outlook
2003 stores. My index actually states aprox 161 000 indexed items. When
working normally all works fine. Indexes aprox 5 items at once, no
overload... But after restarting the notebook it seems that WDS tries to
reindex all items = the number of items to index continuously grows up
to 150 000 items, overloading the processor and disk. It take some few
hours under normal circumstances to finish this indexing.
I have only citeknet IFilter and PDF IFilter addons installed.

Is that behavior normal?
If abnormal: where can be my problem?

Thanks for any help.

Tom Hagen