I know this is probably better posed to Salesforce support... but 1st level email support never responds timely, nor provides a satisfactory answer....
I've inherited a Salesforce org that uses the full name of state in the picklist, instead of the two-letter postal abbrev. i.e. "Michigan" instead of "MI"
This seems to be causing some problems with the Marketo synch where records have the 2-letter abbrev.
I'd happily switch Salesforce to the 2-letter abbreviation, but it's not clear how to accomplish this.
Alternatively, I'll put a fix into Marketo if there's an easy one to deal with it.
What have others done?
Addendum: This may be a matter of simply disabling state and country picklists. I'm finding other discussions about the lack of a choice between 2-letter abbrev's and full-spelling for states in the picklist feature.