It surely is confusing to receive contradictory advice, but please bear in mind that the people on these forums are, for the most part, genuinely trying to be helpful by sharing their best understanding with you. Obviously, not all of the contradictory stuff can be right, but almost every one you will meet on these forums is doing his or her best to get it right.
The motto of these forums is “Show me the science,” so if anyone makes an assertion without backing it up with data, anyone else is perfectly free to ask for references to a published study.
We should all really be emulating Dude Richard Morris, who is very well-versed in the literature, and who is very careful to document every assertion he makes, so if you want to see where he got his information from, you can. Similarly, if you look at videos of presentations by reputable researchers, you will notice that every slide contains a reference to the source the data on the slide came from. Take any presentation that is not accompanied by such references with a grain of salt.
Bear in mind also that nutritional science is progressing (even if not as well as we might like), and understandings change over time. You will still see posts on these forums, for example, asserting that excess protein in our diet automatically gets changed into glucose. This understanding has been supplanted by new data showing something a bit more nuanced, but you will encounter both views. The way to resolve the contradiction is simply to ask for data. That way you can evaluate the posters’ sources, to see which view appears more reliable.
