As was asked, did you lube the stems? Also, did you use the small valve stem "condom" that fits over the end of the valve stem and protects the seals from the sharp edges of the tip of the stem? Pretty important. Lastly, in that first picture, it certainly looks to ME like the blue material the seal is made of is dry rotted. As if it has sat on the shelf a long time. It looks to me like that's your cause. If you didn't use the little valve stem tool, that certainly didn't help.