I don't think this is an issue. When I changed the path that ISPconfig stores the zone files to /var/lib/named, i noticed that it wrote the pri.* files into that directory within 5 minutes.....
I did just change my otherdatanetworks.com name servers to 1and1's name servers.... I think this is what they should be? so....
using 1and1 name servers
subdomain ns1.otherdatanetworks.com points to ispconfig server 1
subdomain ns2.otherdatanetworks.com points to ispconfig server 2
otherdata.com (this is the actual domain I use)
using both otherdatanetworks.com name servers. ns1.otherdatanetworks.com and ns2.otherdatanetworks.com
On the ispconfig server 1, i have the dns master zone for otherdata.com