PGEMPLOYEE - Employee Groups Not Populating

NEWB here. Back in November we ran into an issue adding new Employees in Lawson. When employees were added to one of our companies (Company 10) in HR11, they were no longer being added to any employee groups. All employees hired are generally added to quite a few employee groups. This began happening in the middle of the day on a Monday. We tried recompling HR11 and HR55 but that did not help. We then ran HR155 for one group and it added the group to three of the new employees that had previously been added in HR11 without any employee groups. We then added two new employees. There were added with no groups. Further investigation revealed that it would add groups on the change of an employee record in HR11, just not add. It also worked in HR11 when we added new employees for a separate company (Company 20). After we discovered this Infor came back and told us that there were thresholds related to employee groups in HR11. They did not specify what those thresholds were at the time, however we were instructed to delete some employee groups not being used and run HR155 for individual groups to ensue membership. We deleted one group that had 11,990 employees assigned to it that lowered the total number of records in the PGEMPLOYEE group table for Company 10 from over 1.4 million to 1.39 million records. When a new employee was added the add procedure added him to 69 employee groups. When we ran the process to establish employee groups for our recent new hires, the results were as expected. They were being added to the groups now. It does appear that deleting some employee groups was the short-term answer. Infor later came back and said that it is an issue with the threshold level of data and that they had found in other cases programs like HR511 (by default HR11) have issues when the number of employee groups are > 800. All that we can do now is periodic cleanup for the time being. I do not know if any of you deal with this level of data but has anyone else come across this issue? Forgive me if this has already been posted or if this is the wrong forum. I am not familiar enough with the programs themselves and the add process to know if this is an issue that Infor should be able to 'code' for (i.e. an enhancement request) or if there is something that we can configure on the database side to accomodate such large data sets. We are utilizing Oracle as our database platform. 9.0.1 MSP4 is our application release. Any feedback would be much appreciated. Thanks in advance.