Please use this link to find out more about Payment codes:
http://www.hansamanuals.com/main/english/mailnumber___58377/theconf___526/manuals/levelzero___58377/version___85/hwconvindex.htm
Actually a new version of this bug is SL>>Reports>>Periodic customer statement "accumulates" amounts
Not sure why it was duplicated, I clicked "submit"only once....