Several things:

First, welcome to FlyerTalk! Secondly, this is the wrong forum for this. You can direct it into the Discussions forum, or elsewhere on the board. Lastly, two days can be a very long time. Pricing changes all the time - changing after two days is not unusual.

Now, getting different pricing when you look from two different computers should not happen. Usually that is because someone puts in "JFK" for one search, and "NYC" for the other or something like that.