Agreed. Johnny Brewer did very well. Pretty rare for someone to have such an outstanding day on his first day of his job.
It appears to me that you're misreading his WC testimony. He had worked for Hardy's in Austin as assistant manager since September of 1961. They transferred him to the store on Jefferson as manager in August of 1962. He was made manager of the downtown store just a day or so before his WC testimony. The address of the downtown store was 1213 Commerce Street (or so AI says).
Fans of turning the Tippit murder into the single most complex event since WWII will want to follow Greg Doudna's "work" (to use the term loosely) at the Ed Forum, where Tippit was killed by a professional hitman (i.e., Larry Crafard), Oswald was more innocent than you or I, and ... or never mind, you can read it for yourself. The fact that people actually think like this, and that seemingly sane people like Tom Gram agree with them, is W-A-Y more interesting than the "work" itself, which I admittedly have only skimmed. It all appears to boil down to propinquity, as it should.
The "game" - which is very obvious and would be kind of fun if people simply approached it as a creative thought experiment - is to (1) take every possible outlier, everything that could possibly be interpreted as inconsistent with the accepted Tippit narrative, and then (2) weave a scenario out of nothing but the outliers and raw speculation, regardless of how elaborately Rube Goldberg-like the scenario becomes.