President Rafael Correa responding to the leak [of the Snowden asylum document] by the newspapers has accused the media of spying on Ecuadorean officials. He also stressed that the corrupted media power is the worst weapon that mankind has invented.
WSJ is going off of Assange's own words, and the RT story linked here doesn't try to deny what Univision leaked, it tries to change the question to whether the NSA is hacking into Ecuador.
But it was Assange himself who apologized "if we have unwittingly [caused] Ecuador discomfort in the Snowden matter." Followed by "...If similar events arise you can be assured that they do not originate in any lack of respect or concern for Ecuador or its government,"
The WSJ itself called the situation "Disarray in the Ecuadorean Government", and it seems hard to categorize that as completely false. There was a safe pass drafted on Pres. Correa's order. Snowden even used it to fly to Russia. Ecuador told the U.S. to piss off with its trade agreement. And then suddenly the safe pass is invalid, was always invalid, had nothing to do with Correa, etc. What happened?
Have either of those things been confirmed? I'm not sure his passport was revoked before he left Hong Kong, and I certainly don't think we ever had any official word about any travel documents from Ecuador.
Even if we trust Assange, he's not there and can't know everything. He could easily have been mistaken about a number of facts.