Paper 9 of this series embedded the four-dimensional Riemannian scale-space framework in a five-dimensional Lorentzian parent theory and identified a factor-of-2 discrepancy in gravitational time dilation as an open problem: the block-diagonalmetric dΣ^2 =−c^2 dt^2 + e^(2s/L) dx^2 + α^2 ds^2 gives dτ/dt= sqrt[1−4GM/(Rc^2)] versus the Schwarzschild result sqrt[1−2GM/(Rc^2)] confirmed by GPS measurements. We resolve this discrepancy exactly. The correction requires a single modification: replacing the flat gtt =−c^2 with gtt =− (1 + 2/L)c^2, L= Rc^2/GM, yielding the corrected 5D metric dΣ^2corr = −(1 + 2/L)c^2 dt^2 + e^(2s/L) (dx^2 + dy^2 + dz^2 + α^2 ds^2). Within the framework’s Foundational Principle (Section 1.2), this modification to gtt is not a correction to time but an effective metric representation of configurational change not yet captured by the (x,y,z,s) manifold. Time remains the measure of total configurational change; the model of that change is what is corrected. (1) All geodesics of Papers 1–8 are exactly preserved. Since gtt depends only on L (a body parameter), not on (x,y,z) or s, all Christoffel symbols with a t-index in the spatial sector vanish. The spatial and scale geodesic equations are algebraically identical to those of the block-diagonal metric. (2) The key algebraic identity. The resolution rests on the exact identity (1 + 2/L)−4/L= 1−2/L, where 4/L= α^2˙s^2/c^2 is the ˙s-contribution to the proper time formula. The +2/L correction to gtt precisely cancels the excess, yielding dτ/dt= sqrt[1−2/L] = sqrt[1−2GM/(Rc^2)] exactly — the Schwarzschild result, valid to all orders in GM/(Rc2), not merely to first order. (3) SR time dilation is exact. In the flat-space limit (L→∞), the correction 2/L→0 and ˙ s→0, recovering dτ/dt= sqrt[1−v^2/c^2] with universal c. (4) The L(s)-dependent case. When L is allowed to vary with s (the full dynamical theory), a new Christoffel symbol Γ^s tt =−(c^2/L^3) dL/ds appears in the scale geodesic, sourcing a new s-force from the t-sector. For the current framework with L constant at a given scale position, this term vanishes and the scale geodesic is unchanged. The corrected metric is the unique minimal modification of the block-diagonal metric that satisfies the three constraints simultaneously within the current diagonal, spatially-uniform, constant-L ansatz: correct Newtonian force, exact SR time dilation, and correct gravitational time dilation. It is consistent with but not yet derived from the 5D field equations; the derivation from G^(5)MN + Λ5g^(5)MN = κ5T^(5) MN remains open.