I just got a reply from a master gardener at MN Extension and she seems to think it's an arborvitae/thuja, but it's so different from the arborvitae I planted which grows straight up. But perhaps there are different variations of the arborvitae plants...?
It does have different trunks/roots - at least 2. You might be right about it being two plants growing together, but it seems a little more like the roots grow out making the plant into different sections.
