Would help a lot to know:
How many teams are in the league?
How many players are on rosters?
How many goalies do you start? If you start 2, keeping 2 goalies is fine. If you start 1, I doubt keeping both is worthwhile.
We also didn't know it was a snake draft until your latest post, I don't think. Most keepers I have played in do not use snake drafts after the first season.