At this point I would export your data from Palm Desktop for backup purposes. Once the data is backed-up, change the hotsync conduits to desktop overwrites Handheld and sync. If you change the conduits, it is only valid for 1 sync unless you put a check mark in the "set as default" box.
The best way to preserve your data is to export the data in each category in Palm Desktop to a separate folder on your PC.
Create a new folder on your PC somewhere that is convenient. Name it something like Palm Desktop Data. Click on the link below and follow the instructions on that page for the export procedure.
http://kb.hpwebos.com/wps/portal/kb2/common/article/28734_en.html
Make sure you select all for the range in the export window.
With the data saved in the folder you created, make a copy of that folder and save to a flash drive, cd-rw or external hard drive.
Anytime you make a change in Palm Desktop, export the data that was changed to that folder and save again to the external media.
With this process you can always import the data back into Palm Desktop anytime you have a problem with the data in Palm Desktop or if your computer/hard drive/device crashes.
Click on the following link to the kb.hpwebos.com webpage for the article regarding Changing conduit settings in the HotSync Manager.
http://kb.hpwebos.com/wps/portal/kb2/common/article/26460
For reference purposes, click on the following link for the support page for your device on the kb.hpwebos.com webpage.
http://kb.hpwebos.com/wps/portal/kb/na/zire/z22/unlocked/home/page_en.html
There are links on the page to the user guide, troubleshooting, how to's, downloads, etc.
