...I really doubt if he uses the same lyric twice within a span of several years that he is cross refrencing another song....I really doubt that when Al says 'it' somewhere in RWS, he's making some cross refrence to an 'it' somewhere in Alapalooza e.e
I think most of the examples of AL referencing his own songs mentioned here, except perhaps for the "The Check's In the Mail" example from the original post, are not so much deliberate cross-references by AL, but just coincidental uses of similar lyrics.
For example:
"One of Those Days" - "and my hair is on fire"
"Ode To A Superhero" - "even if his hair was on fire"
I think AL was trying to make a rhyme, more than a cross-reference.
Now, the one that started this thread could be deliberate, by your definition, as "The Check's In The Mail" is a song title from the same ALbum as "Stop Draggin My Car Around" so they weren't years apart, and the reference is to the title, and not a random lyric.