tnHeb “And if redeeming [infinitive absolute] he redeems [finite verb] the field, the one who consecrated it.” For the infinitive absolute used to highlight contrast rather than emphasis see GKC343§113.p.
tnHeb “and it shall rise to him.” See HALOT1087s.v.קום 7 for the rendering offered here, but see also the note on the end of v.14 above (cf. J. E. Hartley, Leviticus [WBC], 476, 478).