These conditional?

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First conditionals both.
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Thank you. Why do they look different than what I would consider some typical first conditional patterns like a present simple in the if-clause and a future "will" clause in the main clause?

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I shouldn't have said 'first conditional'. It is 'zero-conditional', an open condition. If it is Monday here, it is Sunday in New York.
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Thank you, again. Then, again, why is it different in form than what I would consider a typical zero conditional form like the exmaple you gave. Is it an open condition? If it is, what does 'open' condition mean? Can it take any reasonable form?

(I am) Sorry if I caused you trouble.
(I am( Sorry if I have caused you trouble.

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Yes, I think offhand it can appear in many combinations of tenses.

I apologize if I (caused / have caused / am causing / am going to cause) you any trouble.
If they sell them, I buy them.
etc.
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