12" tyre problem - Cuore

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Hi recently i have had the front 2 tyres changed on my Cuore. I have noticed each tyre has a different type of tread. Does this matter? both tyres are the right size, just the treads are different patterns. thanks 4 ur help

hmm

Well, it certainly isn't recommended. I am not sure I understand the mechanics enough to advise properly, but I think the problem is that they get worn down differently and then this can result in problems.
How did this happen? Surely any proper garage wouldn't put on differen tyres on either side?