Sudden increase in gmail spam

Over the past few weeks, I’ve had a huge increase of spam on my Gmail account that is making it through SpamSieve. Almost all of it is messages that are based on a handful of patterns, but I can “Train As Spam” on them all day and they never seem to get filtered out.

The weird thing is that it is only on this one account.

It sounds like there may be a setup problem. Please see this page.