Local routes passed to subnet-up

[Alessandro Briosi]

Hi all,
I'm experiencing a strange problem.
I have setup 2 gateways which are behind a NAT router.

They are configured in Route mode and have the ips 10.0.0.1/32 and 
10.0.0.2/32 on the tinc interface

The also have subnets (192.168.1.0/24 and 192.168.2.0/24 respectively).

Now the odd thing is that when the VPN comes up they both also add the 
local subnet to their routes on the tinc interface:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use 
Iface
0.0.0.0         10.10.0.254     0.0.0.0         UG    0      0        0 
eth0
10.0.0.1        0.0.0.0         255.255.255.255 UH    10     0        0 
tin0
10.0.0.2        0.0.0.0         255.255.255.255 UH    10     0        0 
tin0
192.168.1.0     0.0.0.0         255.255.255.0   U     10     0        0 
tin0
192.168.2.0     0.0.0.0         255.255.255.0   U     0      0        0 
eth0
192.168.2.0     0.0.0.0         255.255.255.0   U     10     0        0 
tin0

the subnet-up script runs this command:
ip route add $SUBNET dev $INTERFACE metric $WEIGHT

Linux distro is Debian 7, with stock tinc version (1.0.19-3).

Should I filter it in the subnet-up script? I have other installations 
which don't create this effect.

Thank you.

Regards,
Alessandro