Should I be concerned when, occasionally during processing, the percent thermometer re-sets or does not seem to reflect the percentage completed?

Not necessarily. Many factors, such as the size of your database, the type of process, the number of steps involved in the process for each record, and so on, contribute to the manner in which this data displays during processing. The process is still running if the Count displayed on the screen continues to change. When the screen displays "Process Complete," you can exit from the process screen and continue with other tasks.