I saw this too when experimenting, but it was the Dodgers who signed both of those players. FA's shouldn't get signed when trades are turned off, so I don't understand that. Overall, it could be a problem with AL & NL All-Stars having a "No" to Hidden. Globally edit, via MVPedit, both of the All-Star squads for Hidden to say "Yes" (or do it manually) and this would hopefully take care of the problem.
Remember, if you're going to import the roster set to MVPedit, you have to delete the "Reynolds, Shane" line from attributes.dat.