Why is JDE automatically ending employees benefit plan IDs after we make employment status changes?

We have any auxiliary employee whom we changed to regular full time. He was already eligible and setup with active benefit plan IDs (like union dues, pension plan etc). When we changed him to Regular full time status, when the R083800 was run, these benefits automatically ended with "ineligible" as the status. Why did the system do that.

If the employee already has certain benefit plans on and calculating we would like this to continue without ending the plans and re-adding them when their employment statuses change.

Any insight would be greatly appreciated.

Thanks,

Ray