SNMP Only on Specific Interfaces

Hi,
I configured SNMP to monitor only specific interfaces for a couple of Routers i do monitor, so under SNMP, for example :

/snmp
set contact=Test enabled=yes engine-id=0x80003a8c04 location=Test \
    trap-generators=interfaces trap-interfaces=Bridge,vlan1 trap-target
    trap-version=2

However, on Zabbix that i configured lately, i still receive information from interfaces that are not supposed to send any data since they are not listed in the Trap Interfaces
So why do i receive feedback from lets say Dynamic interfaces that are not on the Trap interfaces ?

For example why a Dynamic Capsman Inteface is being discovered although it is not in the Trap Interfaces? Or a dynamic VPN Client ?
Any ideas ?

Thanks…