I've used your screenshots and edited them with red numbers for the changes:
In the Connection tab, did you mean to say 50Mbps for the Downstream box? (I'm going off of the info from the speedtest result you posted a couple posts above) The current setting is set at 5Mbps if I'm right which is probably really limiting your output. Try these new settings and see what results you get after an hour(don't forget to restart the majestic 12 node after applying those settings).
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