There should be a way to set limits on Gallery so users are not able to set up to many scheduled apps to run. Currently you can either allow all users to add as many scheduled jobs to the run or none at all. If one user sets up whatever number to run, keeps other users from running their jobs. Either allow Admins to set limits or have server shift jobs around so one user cannot lock a gallery to only run his/her jobs. A combination of both a set limit per user and better job management by gallery should also solve the problem.