Yes, that is the common misperception.

While this can be and will be misperceived you cannot avoid it to happen.

I reposted and upvoted contents I do not agree with overall, even not for their most parts but for a small part of what was given as information, for example. True. It could be interpreted as support, that's right.

But conversely, you wouldn't say that you tend to support such authors or content that doesn't correspond to your views more in comparison with those you agree with, would you? You tend to support what you yourself think is more correct. It would be completely crazy to do it the other way round, wouldn't it?

Would you actively support certain authors on a regular and obvious basis with whom you don't agree with?