I think something odd has happened between your pre-boil and post-boil volumes or gravities. I'm calculating the gravity points at pre-boil and post-boil and seeing a big increase.
Est. Pre-boil gravity points: 7.24 gal * 35 = 253 grav points, estimated on 72% efficiency
Measured Pre-boil gravity points: 7.0 gal * 38 = 266 grav points (implies 75.6% mash efficiency by comparison with above)
Est. Post-boil gravity points: 6.00 gal * 50 = 300 grav points, this seems odd - what's the boil off rate you have entered?
Measure Post-boil gravity points: 6.00 gal * 54 = 324 grav points, higher than estimate because gravity is high.
Does this recipe have a malt extract, sugar or other fermentable addition in the boil? That would explain the increase in gravity points during the boil, and the high brewhouse efficiency number, if they weren't included in the grain bill. Otherwise, failing to take the contraction of the post-boil volume on chilling into account could maybe cause it.
ETA: Is this using the recipe here?
https://www.homebrewtalk.com/f76/punkin-ale-145060/
That has 1lb of sugar in the boil, so the mash efficiency isn't the only thing determining the final gravity points.