Yes. Both intentionally righting and intentionally knocking over a Mobile Goal are intentional Robot actions that move a Mobile Goal in a preferred direction. Righting and/or knocking over a Mobile Goal, depending on the Robot design, could fall under either Plowing or Possession.
Possessing two Mobile Goals is a Violation of <SG6> under all circumstances.
Per clause B of rule <SG6>, "Plowing an additional Mobile Goal while also Possessing one is considered a Violation of this rule..."
Because you specified intent, the first Violation note for <SG6> applies and the Team should receive a Major Violation and a Disqualification for the Match:
Any egregious or clearly intentional Violation will be considered a Major Violation.