PVSLS400

Hey guys i have encountered a very wierd issue with my ls 400 cluster. Did some minor matenence on cluster replacing bulbs took cluster out of car with no issues unpluged it put new bulbs with no problaem my big problem is car odometer said it had 217xxx miles before removal (and have done this to this unit before a few weeks ago autozone did not have enough bulbs to replace all bulbs) and carfax was saying 217xxx was right when i purchased the car exactly one month ago. Now cluster says it has 674912 miles on it did someone roll back odometer or can i go to lexus and have them set it back????