When asking for technical help at the very least let us know the version of firmware you are running.Cliff's Calibration (Mapping) Guide is a MUST READ: http://www.vemssupport.com/forum/index.php/topic,97.0.html
You should get same lambda with 100% (your real physical DC). 130% is calculated from your commanded pulse widths and current rpms. In other words your VE table is 30% higher than necessary. And you are run out injector or fuel pump capabilities (100% is too much anyway).