On 1st or on 4th? There's only one SBUX on 1st between showbox and cherry st, on Columbia I think.
But to your point, there are 2 Starbucks' directly on 1st; one in Pike Place and one just up from the ferry terminal.
I agree, though, that there are an inordinate number of SBUX-owned coffee shops downtown, especially once you factor in the SBCs.