Thought you might like to read this regarding the seat of Moses and what exactly Yeshua was telling us to heed.
http://www.ancient-hebrew.org/m/articles_pharisees.html
Your article opens with a big picture of the Pharisees as portrayed in the Passion of the Christ. Not a good signal of the site/author's objectivity.
Here is how your article suggests we read the verse:
"The scribes and the Pharisees have seated themselves in the chair of Moses; therefore all that he tells you, do and observe, but do not do according to their deeds; for they say things, and do not do them".
This is plainly an illogical reading.
First of all the text does not actually say this.
But secondly, this suggested reading makes no sense. It looks like an edited sentence, as it is. The switch from 3rd person singular to 3rd person plural is completely unnatural, in any language. To say it "could" be phrased like this is to ignore the fact that if one wanted to communicate the message suggested in the article, one would construct the sentence differently, in a more natural way.
The article this is from is really just a relay of the speculation and bias of a non-Messianic Karaite Jew, Nehemiah Gordon.
The article also gives as sole justification for this speculation a supposed contradiction in scriputre:
"Yeshua also seems to contradict himself in this passage as he first tells his followers to do what they say but don't do what they do and in the following verses he condemns the teachings and practices of the Scribes and Pharisees and calls them hypocrites."
How is this a contradiction ? Did the person who wrote this even read their own words ?
Those who walk on the narrow path are supposed to heed and follow the teachings of Moses and Yeshua, and as it happens, Yeshua kept tradition. For example Scripture shows he kept Hanukkah, even though Moses never commanded us to keep Hanukkah.