"I can't seem to find the url to get a web interface on my cameras".
Unless you changed the default when setting it up,
Every IP cam I've used has had the web interface on port 80 like so:
http://<cam-ip-address>:80
(the ':80' is even redundant, as it the default for http and
even the 'http://' isn't required, as your browser will add it)
"I have used the iPhone app that came with the cameras (apcam) and set the preset positions but can't seem to transfer them to the
blue iris app"
I'f you've already configured them in the cam(s), then you may just need to make the names match up
in BI's per-camera preset editing page. Also, make sure you've got the ptz controls enabled for the cam,
and that the user you are logging into BI as has 'ptz' permissions.