Another example of a seemingly meaningless contract clause:
All typographical and clerical errors are subject to correction.
Is this type of clause really necessary? I say no.
If it truly is a “typographical or clerical error”, won’t both parties pretty much agree to its interpretation anyway? If they’ll agree anyway, why would you need to clarify this with a specific clause in the contract?
However the parties could dispute as to whether it is an error at all, such as perhaps the (dreaded-but-all-too-often) mismatch of spelled out versus number:
The notice period is fifteen (30) days
If the two parties disagree as to whether they meant 15 or 30 days, then it wouldn’t be a [typographical][http://www.thefreedictionary.com/typographical+error] or [clerical error][http://legal-dictionary.thefreedictionary.com/Clerical+error], and so wouldn’t be solved by this clause.
Seems like fluff to me and not worthy of sticking into your contractual boilerplate.