DKIM records when clustered servers use MyDNS

When enabling DKIM for a cPanel user and a new DKIM DNS entry is created the DKIM.pm will check if the local nameserver is set to MyDNS. If it is a 1024 bit DKIM entry will be generated. If the local nameserver is BIND for example it will use a 2048 bit DKIM entry. If you are using BIND locally but the cluster it is syncing to is using MyDNS I see the entry being input in to the database but it seems that MyDNS is not able to properly read it or it's not working for some other reason. Is this expected behavior? If you are using MyDNS on the clustered DNS boxes is it required to use MyDNS on local boxes as well? There seems to be no checking of the software the cluster is using so if nothing else there should at least be a separate configuration setting on DKIM key size that is generated.