Rate Increases on tenants with permanent discounts

I also do individual rate increases.  So when I have a tenant receiving a non-expiring discount, I base their rate increase off what they are currently paying.  I noticed that when the account would receive the increase it would remove the discount shown in the ledger settings.  The problem we had, was with the account not showing a discount, we had an employee put the discount back on thinking we forgot to give them the senior discount and they ended paying less then they were.  So I found if you do a rate increase and again this is only if they are done an an individual basis for non expiring discount tenants, that if you go into the ledger settings and put the increase in the new rate box with effective date, it doesn't remove the discount off the account but again they are being increase off what they were paying not based off the unit size.  This way when you look up the account it still shows for example Senior Discount.  As of right now, we increase about once per year.  Unfortunately there will be those long term tenants that pass over the street rates and it's hard for them to grasp that.  I explain it by letting them know that normally self storage is meant for short term storage, so if you been in the unit for 10 years, they are most likely going to be paying more, I just suggest they try to downsize in to a lesser priced unit.