So long as she continues to attend her classes to maintain an F1 status, this should not be an issue.
You need to file an appeal and you should do so ASAP.
Although an entry of a judgment non pros would make the petition moot, I would nevertheless call the prothonotary to confirm whether this judgment was, in fact, entered and whether the hearing has been cancelled. If the hearing is still scheduled, I would come to court and explain to the judge that a judgment in your favor has already been entered.
In order to determine which statute of limitation applies (e.g., the appropriate jurisdiction and length), you have to review the applicable loan documents.
You may want to consider hiring an attorney who is admitted to practice in both states - Pennsylvania and Maryland.
If you are looking for an attorney in your area, you should contact the local bar association.
I agree with the earlier response and would only add that you should have an attorney look over the mortgage documents as soon as possible.
Generally, if the transaction is not complicated (e.g., if it does not involve a foreclosure, a land purchase, or significant construction), you will not need an attorney and can utilize the services of an experienced real estate agent.
I think that you should discuss your situation with an attorney - it is difficult to answer your questions without reviewing the loan documents.
Your situation certainly sounds strange. I would not withhold payment, because you are not getting the monthly statements (especially, if you know the monthly amount due).