First, UNC will use official scores if sent not just self-reported scores. However, like colleges generally, it uses your highest scores, either from one test or by super-scoring multiple tests, to determine admission so those old scores should not have any adverse impact…
Georgetown usually requires all scores for any SAT, ACT and SAT subject tests you have taken (but still claims to use highest scores when determining admission). There is some question as to the extent to which Georgetown is actually requiring all scores this year as it has created a lengthy covid-related rule for submitting tests applicable to those applying for 2021 admission. See https://uadmissions.georgetown.edu/flexible-testing-requirements/.
In typical elitist academic-speak, where ambiguity rules and clarity is avoided, Georgetown states in one breath that no test scores are even required this year. However, it then says in relation to the SAT and ACT that it does not partivcipate in Score Choice and requires an applicant’s entire testing record – apparently saying that without realizing Score Choice is something that applies only to SATs not ACTs. Moreover, in the very next sentence, it says students who “are not able” to submit scores can apply without any test scores.
Then in relation to subject tests it states that it recognizes students may not be able to take them and therefore need not submit them, but then says, “Consistent with our policy on Score Choice, students with completed SAT Subject Tests are asked to submit their scores to Georgetown.” The key word there is “asked” which has a different meaning than “required,” a term used in prior years’ directives, i.e., subject tests may not be required this year even if you take them.
In other words, Georgetown may or may not require all test scores this year. It depends on how you choose to construe Georgetown’s new covid-related directive.