I’m glad you identified what was causing the lack of convergence. Just FYI – Normally, IndModel = NONE in AeroDyn is meant for simulations involving a parked/idling rotor. IndModel should be set to WAKE or SWIRL for operational rotors.
Collective modes have all blades deflecting in-phase. Asymmetric modes have one blade deflecting out-of-phase with the other(s). I have not reviewed your results, but you can find several examples on this forum where you can find interpretations of the eigensolution e.g.:
These examples should help you as you interpret your eigensolution.