Silly Q.. about CB Digital Weeks Predictor

J•
Today I got my 3+ which is unexpected since I am only 4w5d. (Ovulation was confirmed with temps and OPKs) According to this chart I should only get 2-3. Thoughts? 
All I can guess is my levels are plenty high enough..or maybe I was wrong with my temps or OPKs?... (Been worried about MC.. since last time I only ever got 1-2) 

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