Routing Table Question

Two 2600’s back to back in lab simulating serial connection. sh ip route gives me the following:

R2(2600):
C 10.0.0.50/32 is directly connected, Serial0/2
C 10.0.0.48/30 is directly connected, Serial0/2
C 10.0.0.52/30 is directly connected, Eth0/0

R3(2600):
C 10.0.0.48/30 is directly connected, Serial0/0
C 10.0.0.49/32 is directly connected, Serial0/0

Qustion is, why does it show both my subnet (10.0.0.48 /30) and the direct address of the other interface (10.0.0.49 and .50 /32)? Is this something that ocurrs on serial connections? Notice the ethernet connection to the 851w only shows the network and mask, not the other interface.