The first MBAM scan detected & quarantined PUPs (Potentially Unwanted Programs). If successive scans have detected nothing further, don't concern yourself with the manual MSRT scan results.
If you (a) configure Defender such that it scans for PUPs (AKA PUAs/Adware), [1] (b) manually update Defender's Definitions via the Update button on the Update tab and then (c) run a Full scan, is anything detected & removed/quarantined?
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[1] See http://www.winhelponline.com/blog/defender-enable-pua-pup-adware-protection/