Multiple automatic discounts for memberships
I was able to reproduce the issue using the discount code configuration you provide in your screenshots and it appears that it has been reported to the developers of CiviDiscount here. So, bottom line is, your codes are set up correctly, but currently only one autodiscount can be applied per contribution or event page.
You may wish to offer funding in the same thread listed above if resolution of this issue is of high priority to you.
Hope this helps,
Tamar