Hello Alec, thank you very much for responding.
I am experimenting with your explanation and the sample files you kindly presented on your blog - unfortunately I am unable to adapt it properly to my needs (the main difference being that your rules are attached to a button within the repeating table).
I am trying to achieve the same with a button I have created for submitting.
All I basically want to do is create a rule(s) on the submit button that will set the value of field outside of the repeating table to the value of a field in the last of a repeating table.
I have a repeating table called Events and my field is LastEvent.
Any suggestions would be very welcome.