Whenever I trade for player rights, they dont appear under my reserve list.
I'm having this issue as well
I found that too when I was creating my new team page.
What you have to do is...
Trade for the player (RFA) you need
In order to actually sign that player you need to click the "sign/offer sheet" button, BUT you need to go find that player on his original team and his status will show "ACQUIRED" beside his name.
For what ever reason, his rights don't move over to the team who acquired him?? But as I said, it'll say it when you find him on the other team
Then once you sign him he will show up on your roster.
Still might be a slight glitch but that's how I figured out what to do.