The highID status has nothing to do with any of these settings. it also has nothing to do with you downloading many months and then just "earning" the highID status. It only has to do with your ports are open for aMule to receive incoming connections. Regarding your "aMule is slow" issue, try setting the max conn/5 sec to 5 or 6, that's the higher value my router can take, maybe yours is the same.
Regards.