Early Globals used to suffer various flight control snags (spoiler or Slat/Flap) after engine start, which could be reset by isolating the 2 power feeds to each of the 2 FCUs (Flight Control Units) via the EMSCDU. Drastic I know, but removing power to the FCUs in flight would stop the spoilers operating and keep them closed. You may also lose trim and AP etc, but once configured for landing it could be an option to help you regain roll control.