First, OPT stands for Optional PRACTICAL Training. Second, it is not a status or employment visa, in and of itself. Those on OPT are still in F1 student status, but receiving training through OPT. And they are authorized to do so by filing a request for employment authorization.
I do not want to be negative, but in this case, I don't think either of those motions is going to be useful. Why? Because a Motion to Reconsider is in cases where there are errors in fact or law that should be considered, and a Motion to Reopen is in cases where there are new facts that should be considered. Submitting the incorrect filing fee does not fall within either of those two categories. Moreover, as an error on the part of the applicant, and not the USCIS, there is little to any chance it will be considered.
Unfortunately, as you can see in the article at the following link, the USCIS strictly enforces this rule: http://www.murthy.com/2016/04/28/uscis-enforces-30-day-opt-filing-rule/
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