Earlier quoted context omitted.
What do you mean by "confusing"? They have different names. If you select "California St" you get California St, and if you select "California Ave" you get California Ave.
You tap on a California St address and Maps directs you to the same address but on California Ave...
I just put the two following addresses into Notes:
23 California St, San Francisco, CA
23 California Ave, San Francisco, CA
then tapped on both of them and Maps brought me to the correct spot each time.