It really depends on the context of the music. Is it changing between two strings? Is it when there is an arpeggio? etc. An example of what you are seeing would help. I thought at one time Parkening had some right hand issues with some finger weakness and possible nerve damage (if I am correct) - maybe that would explain the fingerings. If you could post an example some one here would be able to help for sure.

Regards,
Joe Pinnavaia
http://www.guitarlessonsbuffalony.com