I've been watching too many breaks of Tribute and so I have also been recording the Serial Numbers of cards that Topps didn't specify such as the Tribute Autograph set which is the base auto set. The set also has parallels up to /150. Most of the cards in the set are serialed to 199 except for a handful of popular players such as Mike Trout to /25 or Hank Aaron to /10.
What I have noticed is that I have not seen these cards in higher parallels than their base. For example, I have seen a orange Trout parallel which is also to 25 but I have not seen a /150 or /99 at all. Another example is Rod Carew where he's been serialed to /131 but I haven't seen a /150 blue parallel. So what I'm thinking is that these cards could possibly not exist and Topps did not specify so in their released checklist.
Here's the spreadsheet of the current cards that are shortprinted. If you do see any cards that breaks this pattern, lmk!
https://docs.google.com/spreadsheets/d/1tCtGRhywyZFGBEPsoN4Tn3WtnHvj04Qo3DInRIBrJoA/edit?usp=sharing