I’m going to say that it does NOT include tax/tip since tax may depend on geographic area, and you should free to tip as much as you like. 
Whoa, a blast from the past. Growing up, I despised their pizza and hated the people serving. But those people are probably all retired, so I’m glad to hear that things have improved…
I vaguely recall enjoying their subs (which might have had the vinaigrette of which you speak).