Here's the Chron story on Chris Bell's lawsuit to remove the mysterious Stephanie Simmons from the ballot in SD17. The main takewaway is this:

Bell sued the Texas secretary of state and Simmons. He argues that Simmons doesn't meet the Senate's residency requirements. Senators must reside in the districts from which they are elected for at least one year, and he claims she has not met that requirement.

He said the secretary of state, a Republican appointee, immediately certified the ballot, cutting off any administrative appeal.

The secretary of state's office declined to comment, and efforts to reach Simmons were unsuccessful.

I should note, by the way, that I haven't mentioned the Kim Brimer lawsuits before now because I figured any idiot could see a distinction between an incumbent who filed (or had surrogates file) multiple lawsuits and pursued multiple appeals over the course of several months, and a candidate who's filed one suit because he didn't have the opportunity to pursue an administrative appeal with the Secretary of State because the filing he's challenged came in and was certified right at the deadline. But it seems I misunderestimated about that. Bell is of course taking a risk by filing this suit, and if he loses he'll have to deal with how his action is perceived. I said the same about Brimer when he filed his latest lawsuit, before it got tossed and he kept right on going. If Bell follows that path, he'll look bad, too. Most likely, the clock would run out on him before he could get that far anyway. Texas Politics has more.