If a time deposit with individual ownership names 2 beneficiaries and 1 dies before the owner, does the remaining beneficiary receive 100% of the funds? Regarding another time deposit with the same ownership names 2 beneficiaries and 1 dies after the owner, does the remaining beneficiary only receive 50% of the funds? What happens to the deceased beneficiary's 50%?

It would be based on State law, but normally in your first scenario - the surviving beneficiary gets 100%. In the second, 50% would go to the estate of the deceased.

Refer to: https://codes.findlaw.com/md/financial-institutions/md-code-fin-inst-sect-1-204.html