However, an insurer that, under the circumstances described in subdivision (1), advances payment to the insured in an amount equal to the amount provided for in the offer of agreement or settlement, has full rights of subrogation as provided in its policy or endorsement affording the underinsured motorist coverage.
except that the paying insurer may recover from the insured of the insolvent insurer that part of its payment that exceeds the limits of liability of the policy of the insolvent insurer.
IC 27-7-5-6