Suckstobeme,

Yes, it would be a waste of time and money to have your husband take another polygraph "test." The first polygraph was also a waste of time and money. Polygraphy has no more scientific basis than phrenology or graphology. That's how your husband could "fail" question #1 yet "pass" question #3.

If I were in your position, I would place no reliance at all on the polygraph results in deciding how to proceed with my life.

To understand why polygraphy is so utterly unreliable, see Chapter 1 of AntiPolygraph.org's book, The Lie Behind the Lie Detector, which you can download here:

https://antipolygraph.org/lie-behind-the-lie-detector.pdf

It's also worth bearing in mind that if your husband were lying, and intended to fool the polygraph, he could have learned precisely how to do that from Chapters 3 & 4 of the same book.