That second was going wide and he didn't need to save it. If they'd scored from the corner it would have been another goal he'd cost us. So probably not the best example to use.
I'm not sure why it's so difficult to all just agree that he's an occasionally good, usually OK, sometimes shocking goalkeeper. All keepers have good games, all have bad games. The difference between the really good ones and the rest is that they have more of the good games, and their mistakes are rare enough to be remembered. Unfortunately for Joel he doesn't seem to be able to get to that level. After a very good run, he's had a number of games where he's simply not been at an acceptable level for a team in the top 7. After 4 years of being here, I don't think he ever will be.