One way to rule out really sensitive switches would be to place tape or a piece of paper between the star rollover switch contacts, then activate the slings. If the post still goes down we know something is going on. Do the rollover switches have the little disc caps on them? I believe they should, but not positive. That could be an issue. Last thing to check is the inlane switches. They too cause the post to go down. They may be gapped really close and causing this issue.