New AOS failing?

[epapp]

I had a few follow up examinations with the new bellows and it is indeed finally sitting perfectly with no leaks to be seen.

All other connections are free of oil seepage and the like.

I guess my question is how likely is it that my AOS is 'bad' or that there is some other symptom 'killing' my previous and new AOS? Also, is it indeed normal to have oil in the tube from the AOS to the TB (J tube on 97-99 years)?