Blueberry Burst & Blueberry Kisses

Charlie starts with ...
Hello,
I’m from Perth. I bought Blueberry burst and blueberry kisses from Guildford garden centre on the weekend . I planted into a 50cm Yates pots using 50% pine bark and 50% Osmocote Professional Rose, Gardenia, Azalea And Camellia Potting Mix. It was click and collect order at guildford garden because of covid -19, I noticed there a brown spots on both plants leaves when I collected it. Please advise what are those brown spots . Are they blueberry rust ? See photos . Thanks you .

Pictures - Click to enlarge
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