I've been working with Databases since 1984: including mySQL, data analysis, modeling, migration, conversion, integration, aggregation, mining, optimization, performance tuning, warehousing, etc.
Since it is difficult to determine the scope of the project from the current description, my price is only general. Once we determine the cause and cure, I'm sure we can come to a mutually agreed upon price or hourly rate.
Could you send me the table structures of what you are trying to import: The actual SQL statement that created the tables. Especially ones with two timestamp columns.
Also, what version is the database that you exported?
What version is the database you are importing into?