The list of lease numbers shows the same lease number more than once, or numbers not in the correct order. What’s going on?

The index for the database has been damaged, probably because the computer lost power while EZLease was running.

Never turn off your computer while EZLease is running. Always exit properly first. 

To fix this problem, go to the Help menu, and choose Repair Database. The index is rebuilt, the database is checked for other errors (which, if found, are reported), and the problem will go away.