How is this supposed to work? Using different pin pairs on the serial bus for what reason... and perhaps more importantly, to what end?
How about connecting as thus, where A1 = Arduino #1, and A2 = Arduino #2
A1-RX1 ---- A2-TX1
A1-TX1 ---- A2-RX1
A1-GND ---- A2-GND
... or ...
A1-RX0 ---- A2-TX2
A1-TX0 ---- A2-RX2
A1-GND ---- A2-GND
... etc ...
Thus, always use the same serial port pairs on both Arduinos to minimize confusion.
Also see the great work that Bill Porter did with Easy Transfer. Then you can send stuff, confirm that the other Arduino got it, etc.