Look at the template, as this is the likely culprit making links to these 302 redirects. If they are not required, simply remove any references to the link on your template?
If they are necessary links as you say, customer login etc - add a nofollow tag and de-index the page.
Ensure you have self-referencing canonical tags on the pages with lots of parameters.
You could also remove the a tag to something less SEO friendly to reduce your potential crawl budget ensuring that your non-vital (product/category) pages exhume more importance.
If you have so many links/pages, they will get lost within all the nonsense.
