Dear Arsalan,
I took a brief look at your results and it is surprising to me that the fore-aft displacement seems to dominate over the side-to-side displacement until mode 8. Normally I’d expect more closely aligned pairs of fore-aft and side-to-side modes of similar frequency. I would question the accuracy of the eigensolution. Are you running the same BModes model you shared in the following post: Modes of BModes? Have you checked the sensitivity of the eigensolution to tor_stff and axial_stff, which were set arbitrarily high? (Instead of using 5 orders of magnitude higher than flp_stff and edge_stff, perhaps try setting tor_stff and axial_stff 2-3 orders of magnitude higher.)
Best regards,