Format and title issues on Kindle/Mac

I have a number of titles that I read as epub on my ipad, but mobi on my MBP using the Kindle/Mac software. I've noticed that the titles often don't show up properly in the Kindle software (e.g. missing author), book covers don't show etc. In addition, TOC entries are often messed up.

Are there any plans to address issues with mobi formatting? (Is this specific to the Mac software, or do Kindle users encounter it too?)

(Image attached. Cover, title and author should show in this list, but aren't terribly consistent across titles. Books purchased from Amazon are fine.)

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