I've never understood why you post most things twice?

I spend all day out and about in my van, and I like to keep upto date on my emails, and amuse myself when bored waiting for a job, stuck in traffic jams etc... The web browser on my phone is shite (so need to get an iPhone) and I take my laptop to work anyway, so putting the two together (connection from phone coupled with the web browser and keyboard of laptop) makes perfect sense.... It's only when I'm at work, I don't really bother when out and about with friends etc (unless they REALLY boring lol)