Yes you are correct. However the player is Auto-Sk'd one level lower then the range. So anything below 50 will be 49. A 50 remains a fifty since the max of the range is not less then 50..
As for finding teams to do other things... Be the leader of the team and let them know what you want to do.. If they dont like it, they will leave and you can find more. If they dont mind, then they'll stay. There is ALWAYS people out there willing to team for stuff their lvl. You just have to find some. 
Use the request channel in game if you cant get people from broadcast. That is what it is for. Also there are server wide global channels you can join. As well as channels that go over more then one server... If all else fails post in the forums under the server you are on and see if that helps. =D There are more people out there looking for the same as you. I promise.. ^_^ Just be sure not to send blind invites.. ALWAYS ASK FIRST! It's polite..
-X2-
@x2crunner and @x2crunner2
Lately, whenever I've joined a PUG in AE, more than one player insists on playing an "Auto-Sidekick" mission. As I understand it, this is one that's set to 50-54th level so that every player has to be raised to that level range, and be guaranteed of getting XP. Is that correct?
Now, I like getting experience as much as everyone else, but some very interesting-looking missions are lower than 50th. How can I get a group together who is interested in playing them?
Also, how can I get a group to playtest my missions when they aren't set to 50-54?