Should This be IBR or IBR 2014?

I took out student loans (100% for grad school) from 1996 – 1999. I unfortunately defaulted in 2014 and then filed for bankruptcy in 2017. The bankruptcy was closed and my default was cured in 2018. All of my paperwork now shows my loans as originating in 2018.

The SL estimator originally showed me as being eligible for IBR 2014. I called Aidvantage who stated that I was on IBR and that it didnt matter which one because "there is no difference between IBR and 2014 IBR". Now I know that is not correct since both the length of repayment and max % of income are both different

Does anyone know whether this should be IBR or IBR 2014?

Side Note: This came up because I recertified and while my AGI went up $8800/year, my SL payments have gone up almost $500/month. The change represents 68% of my AGI increase ($110K > $119K). I did ask about the calculations for my monthly payment and was told they need to open a ticket.

Thank You!