The only form I can find asks about my partners name etc, but doesn't mention income.
I just had a quick read of your link and that seems to be question 68 on page 7, where is also says "Read page 5 of the CH2 Notes.". It's doesn't seem to ask what he earns, just if he earns over the cap and then other relevant questions for that cap.
The UK brought in the RTI (Real Time Information) system for HMRC in the tax year 2013/4 so they will know if he or you earn more than 50K in a tax year as they can see each time you and your husband are paid.
If either of you earn more than the cap, then you have to submit a SA on time to HMRC. If the SA isn't in on time, HMRC will fine them as they can see that person earned more than the cap.
I'm a little nervous about them putting it in my husbands name too.
Thanks for your feedback though. It's all so confusing and I'm terrified to impact him negatively.
As long as the claim in your name only as you are allowed to claim, it won't be a breach of his visa. You can see why they need his details as he forms part of that 50k cap for your family, but the claim is only in your name.