I've pointed this out many times before, but here we go again. Having two doctorates is not a plus. It's a red flag for weirdness. A doctorate is a credential that you're qualified to do independent scientific research. There is no point in proving that twice. You get a doctorate, then you move to a postdoctoral position. Even if you want to change fields, you usually do this via a postdoctorate.
The only conceivable reason, IMO, to get two doctorates (let alone two in the same field) is if you've so alienated your original doctoral advisor that he won't write recommendations; but even then, I've seen people work around this.
Thank you for sharing your opinion of the matter, RWP.