Big problem with routes

RouterOS General
1

Ok so, i have 3 pppoe connections, 1 with a dynamic ip and 2 with a static one. My setup is something like this
mark routing 192.168.80.0/24 for 1 pppoe static ip, 192.168.90.0/24 for the second one with another static ip and all others subnets for the dynamic ip without any mark routing since this i want to be my main internet connection, all my router trafic and all others subnets trafic must go through it. Now for this i have a default route from my dynamic pppoe connection - add default route is checked, i have also made a static one for this since this dynamic pppoe connection i want to be as a main connection. All others pppoe connections with the static ip does not have the option ‘add default route’ checked since has some marked routes entered manually. Ok so far so good, BUT if a pppoe connection with a static ip is reset then the default route is i don’t know how automatically modified with the one from the reset connection and all trafic goes through it.. why is this?
Here is my routes setup, rds_acc50_228 and rds_acc50_229 are the pppoe connections with the static ip

[admin@MikroTik_Node1] > /ip route print detail  
Flags: X - disabled, A - active, D - dynamic, 
C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme, 
B - blackhole, U - unreachable, P - prohibit 
 0 A S  dst-address=0.0.0.0/0 gateway=rds_acc50_228 
        gateway-status=rds_acc50_228 reachable distance=2 scope=30 
        target-scope=10 routing-mark=routing_mark_acc50_228 

 1 A S  dst-address=0.0.0.0/0 gateway=rds_acc50_229 
        gateway-status=rds_acc50_229 reachable distance=3 scope=30 
        target-scope=10 routing-mark=routing_mark_acc50_229 

 2 A S  ;;; Default route RDS (main route)
        dst-address=0.0.0.0/0 gateway=10.0.0.1 
        gateway-status=10.0.0.1 reachable via  rds_fb100 distance=1 scope=30 
        target-scope=10 

 3  DS  dst-address=0.0.0.0/0 gateway=10.0.0.1 
        gateway-status=10.0.0.1 reachable via  rds_fb100 distance=1 scope=30 
        target-scope=10 

 4 ADC  dst-address=10.0.0.1/32 pref-src=86.122.51.229 
        gateway=rds_acc50_229,rds_acc50_228,rds_fb100 
        gateway-status=rds_acc50_229 reachable,rds_acc50_228 reachable,
               rds_fb100 reachable 
        distance=0 scope=10

and pppoe connections

/interface pppoe-client
add comment="Pppoe static IP - x.228" disabled=no interface=\
    ether2_WAN_rds_acc50 mrru=1600 name=rds_acc50_228 password=xxx \
    user=xxx
add comment="Pppoe static IP - y.229" disabled=no interface=\
    ether2_WAN_rds_acc50 mrru=1600 name=rds_acc50_229 password=yyy \
    user=yyy
add add-default-route=yes comment="Pppoe dynamic IP" disabled=no interface=\
    ether1_WAN_rds_fb100 name=rds_fb100 password=zzz use-peer-dns=yes \
    user=zzz

Now if one connection from those .228 or .229 is reset then this

 2 A S  ;;; Default route RDS (main route)
        dst-address=0.0.0.0/0 gateway=10.0.0.1
        gateway-status=10.0.0.1 reachable via  rds_fb100 distance=1 scope=30
        target-scope=10

 3  DS  dst-address=0.0.0.0/0 gateway=10.0.0.1
        gateway-status=10.0.0.1 reachable via  rds_fb100 distance=1 scope=30
        target-scope=10

will automatically become this

 2 A S  ;;; Default route RDS (main route)
        dst-address=0.0.0.0/0 gateway=10.0.0.1
        gateway-status=10.0.0.1 reachable via  rds_acc228 or rds_acc229 depending on which one was reset distance=1 scope=30
        target-scope=10

 3  DS  dst-address=0.0.0.0/0 gateway=10.0.0.1
        gateway-status=10.0.0.1 reachable via  rds_acc228 or rds_acc229 depending on which one was reset distance=1 scope=30
        target-scope=10
2

I suspect that all pppoe connections are part of the same network from the point of view of your provider. Looking at the last route you have posted:

 4 ADC  dst-address=10.0.0.1/32 pref-src=86.122.51.229
        gateway=rds_acc50_229,rds_acc50_228,rds_fb100
        gateway-status=rds_acc50_229 reachable,rds_acc50_228 reachable,
               rds_fb100 reachable
        distance=0 scope=10

you can see that IP=10.0.0.1 is reachable from all pppoe interfaces. So, when you reset one the router just picks one since all of them have the same value.
You can try to set the default route without specifying the IP but instead the interface

3

Yep, all pppoe connections are from the same network. You’re right with the interface instead of ip, after some time playing with routes i discovered the same thing, in this situations like mine it;s more safer as you said.

4

You should see if the provider will let you use MLPPP.
Bond them as a single pipe and get higher top speeds, automatic redundancy, less complicated IP / routing configuration.