Looks like pressure is leaking into the chra. Probably somewhat normal for a journal bearing turbo with no oil pressure. I'll have to check that spot next time I run a boost leak test
Yes. It's not enough to cause an issue. When the S3v2s came out, a few people reported that their red rubber seals on the compressor side were not adequate and were causing a small boost leak. They fixed the issue by using some red RTV in addition to the rubber seal.
When clocking my turbo I found that the compressor side bolts were pretty loose. Bryan told me he does them to about 12ft/lbs. I reassembled the turbo and used 1 ugga along with some blue loctite.