|I can't see routing tables differing too much from one device to another although what you're posting is odd to my way of thinking.|
Here's an MS article on routing as per the command prompt window in XP:
Give it a read. If it still doesn't make sense, then do some googling on the subject of adding routes in a routing table.
Typically you add a route from one network to another. I suspect from the looks of what you posted above, your router is assuming you're always going to be routing from the subnet on it's LAN and uses that as the default "source". If that's true, that's too bad as it isn't as flexible as if it were a normal routing table.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.