1. Case by case. Your green card pending case doesn't matter about how many more jobs with you. Keep your current case in good status.
2.Your possible new job could be your back up for your immigration if you need in the future.
3.Don't make sponsor company withdraw your sponsorship because you have second work.
4.In case, make sure the LLC company is not any problems or trouble happened.If they have or later, it is possible trouble for your immigration case.
Remember: Don't change or shift the good and safe lane in your immigration road and keep going.