Concerns about sending subject test scores

I took the SAT subject test in Math II and Chemistry in the fall but did really terrible. Unfortunately, at the time of registering for the exam, I already sent both scores to four colleges (all of my dream schools!). I’m retaking Math this October but not Chem. I received a 760 on US History last year.

Most of my schools want two subject tests. Do AdComs consider two of my best ones (History and Math) and ignore the mediocre score I got on Chem?

Yes

SAT provides you a choice to send the best subject test scores to schools.
(only few colleges want to see all test scores, e.g. Stanford)

One thing everyone should learn is – see the scores before you send them.
(college board free 4 school services only saves your $12 x 4 = $48 bucks but you take a risk of sending unknown scores)

While true, the OP already sent the scores.

True, but at this point, OP can only live and learn.

True. Few schools require all SAT or ACT scores. Even fewer require all Subject Test scores. Stanford, however, is one school that does not require all Subject Tests.