KPruitt......I know our friends have a similar issue with their Neptune. Are you dumping the air before leveling. If you leave the coach aired up, it doesn't give it much working space to get it level.
You can also level the coach manually. REMEMBER.....on Monaco coaches, you must lower the front jack first and then lower the rears to level side to side. The coach needs to pivot off of the front jack.
My coach only has manual leveling so I haven't tinkered much with the auto units. I know they can be adjusted to correct the final level, but I don't think you can limit the extension of the rear jacks.
Don & Mary
2019 Newmar Dutch Star 4018 - All Electric
2019 Ford Raptor Crew Cab