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Does your report show a collection acct has fallen off? It sounds like that's what happened.
With MyFico you can purchase every 24 hours. Another option would be to go to your most recent report and click on the option to dispute errors. I recently did this with Transunion, not sure if it works with all 3 but it will pull a updated report for you to check for errors. Check the negative/adverse accounts section to see if the collections acct is still there.
This happened to me... I have CCT, so I knew ahead of time that my EX score had gone up, but MyFico hadn't updated. Finally this morning I had an inquiry hit EX which triggered MyFico to update, so it looked like my score had gone up due to an inquiry, but really it was because a new credit card had reported like a week ago, but EX just hadn't updated since then.
Something probably changed and EX just never updated til the inquiry hit your report.
Oops, sorry! Credit Check Total. It's gives you real fico scores too, but I think it's owned by Experian, cause you can get a new EX score/report every day if you want.