I couldn't get the link to work, but here's a thought, why don't you ask her? Call her office and ask for an explanation. Maybe the legislation you are apparently in favor of stinks in some way. Maybe she was committed by some other agreement (lawmaking,
don't look.) Maybe she goofed, but what are you going to do, watch every vote she makes till the next election?
Does this issue affect you personally or are you just determined to shoot at anything or anyone who looks like a Democrat?
Joe