I did a mybb conversion today it looks like all the forums posts are there from all of the members but they all show up as Guest John Guest Joy, as well when i go into the acp none of the members are showing, am i missing something?

Thanks in advance

There is a possibility you might have different member groups on MyBB as compared to IPS member groups, and during the conversion you haven't retain your MyBB member groups. Perhaps, you need to clean up the conversion and redo it again.

so i would need to empty the DB and run the conversion again?

Emptying the DB means your IPS installation would also be lost. Instead, remove/delete the faulty conversion (i.e. the content/members, etc) and start a new conversion.

Feel free to submit a ticket and we'll be happy to take a look and provide guidance.