Not having that same problem on mine. I export to iCal. Quit iCal, restart, and it's still there. Using BixX ver. 1.4.5

To export to iCal...
1. Click the Customize tab.
2. Add carryover blocks, trip trades, add/remove trips, etc. until it's your line.
3. Click the Export to iCal button.
4. Trips appear as pairing numbers as all day events for the duration of your trips under a "BidX" calendar file. (Great format for a month view. It does not list specific flight details.)

(btw, the "Print Custom Line" option Rocks!)