Same VLANs on 2 diferent interfaces, is this valid config ?

[ptt]

As the thread title say, i have 2 interfaces, and want to use 2 VLAN on each, as indicated on diagram:

em0 –-> VLAN20 --> WAN1 --> 186.xxx.xxx.xxx /25
em0 ---> VLAN40 --> WAN2 --> 186.xxx.xxx.xxx /28

em1 ---> VLAN20 --> WAN3 --> 186.zzz.zzz.zzz /25
em1 ---> VLAN40 --> WAN4 --> 186.zzz.zzz.zzz /28

em2 ---> LAN

em0 ---> VLAN20 --> WAN1 --> 186.xxx.xxx.xxx /25 &  em1 ---> VLAN20 --> WAN3 --> 186.zzz.zzz.zzz /25 are connected to a local "crap" bandwidth manager, that i cant touch

em0 ---> VLAN40 --> WAN2 --> 186.xxx.xxx.xxx /28 & em1 ---> VLAN40 --> WAN4 --> 186.zzz.zzz.zzz /28 are connected to the 2 ISPs upstream routers

I have done some tests and seems to work, but i want to be sure tha it is a valid config.

Thanks for your coments