Have problem syncing bold 9650 OS 5 with Win Olook calendar 2007.

Syncing tries The following changes from calendar device will be applied to OL IN CALENDAR : delete 387 device entries when I have it set to transfer items all all sheduled items, and add 594

that number drops down to 263 deletions and 470 additions
when i change the config to " within a range of days that I set at 700 before and after and check remove alarms for past

PRE sync the device had 595 calendar entry's and OL had 390


The changes from OL to device remains the same 7 additions
I am afraid I will lose data if I go through with it

This device has not been synced with this computer for over 3 months and I think I should have roughly the total of both device and laptop.