I Give up on understanding credit scores

[Mr645]

this morning I was notified by three different free services, Credit Karma, Transunion and my bank, that a collection account was added to my credit report. So I check it out and after an hour, determine it's a medical bill from last year. $64 and I thought I paid it but turns out I had two bills for the exact same amount from the same "E-MED services".

My credit score went up 33 points on Trans union and 34 points on Equifax.