If the "unused" space should not be used, why its subnet 10.10.0.0/x is managed by MAAS?
Without knowing the exact setup of your MAAS I can't really advise you what needs fixing. Please, provide more details, e.g.
maas profile subnets read maas profile nodes list
Pasting the contents of /etc/network/interfaces on each machine and container will also help.
If the "unused" space should not be used, why its subnet 10.10.0.0/x is managed by MAAS?
Without knowing the exact setup of your MAAS I can't really advise you what needs fixing.
Please, provide more details, e.g.
maas profile subnets read
maas profile nodes list
Pasting the contents of /etc/network/ interfaces on each machine and container will also help.