[I’m writing completely from memory; check everything!]
I believe you should see a “passage” vote for both chambers, if the first chamber passed a bill.
I haven’t researched it, but consider picking the last such motion for each bill, chronologically, for each chamber. If you need help with the query, I can.
On the other hand, research might lead you to decide that you want to include all of these votes, even when there are more than 2.
By “research”, I mean sampling a few of the problematic bills, going to the state website, and studying the bill’s history, in order to get a sense of the universe of reasons why multiple “passage” votes could happen. Reasons I can think of (possibly incorrect!):
- rarely, a chamber votes to reconsider, then votes for passage again
- commonly the second chamber to vote on a bill amends it, requiring either a conference committee and second “passage” votes in both chambers, or just a second “passage” vote in the first chamber on the amended bill
It’s quite possible there are some scraper bugs in some states leading to incorrect classification, but I’d guess that most of the multiple-passage bills are legitimate.