Four members have resigned from the Missouri Legislature. However, they are still showing up in results for OpenStates.
House Speaker John Diehl was was replaced by Todd Richardson.
Senator Pro Tem Tom Dempsey was replaced by Ron Richard (R)
Rep. Don Gosen and Sen Paul LeVota should also be removed, though I don't think they have replacements at this time.
Thank you for reporting these issues - they should now be resolved.