The 'Rats are coming clean on this call because they suspect that its existence is going to come out anyway.
This is nothing more than a way of promoting an "innocent explanation" for:
1. A call from Joe Lockhart to Bill Burkett.
2. A call from a CBS producer to Joe Lockhart.
In other words, a "modified limited hangout": they assume the calls are going to become known anyway (probably because they don't trust the unstable Burkett to keep his mouth shut). So, get some misinformation out there on the record.
All we can say for sure is that the calls took place. What was actually said could be anything -- except what has been admitted to.
Another set of dots...
First of all "I cant recall" is a term usually used when you don't want to admit the truth and you think you can get away with it.
Second of all, it seems more likely that Burkett passed the forgeries to the DNC and then DNC forwarded them to CBS. CBS then wasn't happy with the quality of the copies and Mapes called Lockhart to get her better copies. Lockhart then called Burkett and Burkett then went to Kinko's to fax his forgeries directly to CBS.