TDA switched my account to margin without my permission?

So I've checked in the past to make sure my TDA account was Cash. I opened it as cash therefore it still should be. It was. The other day I was looking through my recent statement and there was several "internal transfers with zero dollar value to unknown account numbers. Don't know what that means, but my tin foil hat picked up a signal. Under account type it said MARGIN!!

I checked on the browser and under margin it in deed said 'enabled'. I looked through my recent history and again there were several "internal transfers."I called yesterday and spoke with a really cool laid back stoner dude. He assured me my account was not margin as he was looking right at it and it is cash.

He had me check the status again and I told him it said "margin enabled." This must be a "technical issue." He assured me I would be able to vote with my shares. But did not comment when I asked if they were being lent out. He seemed to be dodging the question. Or maybe I was just being paranoid. idk. I'm calling today to talk with tech support. Will update.

Edit: Update. I contacted tech support and they said (after being on hold for 15 minutes) I must have "accidentally switched it to margin." They are removing margin now. Hmm. Yet the guy last night said I definitely have a cash account. I am 99.9 % sure I didn't accidentally apply for margin.

Edit: It has been brought to my attention that internal transfers show up when an account is changed from cash to margin or vice versa. In conclusion, the most likely scenario here, is that I am just a suspicious smooth brain 🦍 and TDA is not being sus. I apologize.