If the “International Oxbridge Merit Scholarship” is a scholarship from Oxbridge Programs I would drop it as an award.
Oxbridge Programs is a for-profit summer camp that has no association with either Oxford or Cambridge beyond renting space from them. Princeton has a very good relationship with Oxford and will know full well that the program has no actual link to the universities. You have much, much better awards.
(ps, if your National Immersion scholarship is similar, ditch it also. If you can’t bear to let it go, put it in parentheses next to the activity in your Common App (summer 20xx: (name of course], Oxbridge Programs (merit scholarship recipient).