I recently had a thread with this problem.
http://forums.hybridz.org/topic/110673-ms-2-v-357-spark-table-inop/
You have to be careful where your trigger wizard is. Here is a copy and paste from Matt when I was having this problem
"Found the issue. Turns out you were right in the "forbidden" area for > the Trigger Angle for MS2/Extra. MS2/Extra has two spark modes when > running in Basic Trigger. If the Trigger Angle is 19 degrees or less, it > runs in "next cylinder" mode and uses each pulse for the ignition timing > on the next cylinder's spark advance. An angle of 20 degrees or more > pushes it into "This cylinder" mode, where the spark angle has to be > several degrees less than the trigger mode. To avoid this problem, the > spark angle must need to be less than 20 degrees, or 50 degrees or more"