A rollover IRA is a traditional IRA. The tax code does not distinguish between IRAs that receive regular contributions and IRAs that receive rollover contributions. The only thing that is unique to a particular account is the calculation of earnings attributable to a contribution being returned before the due date of the tax return, but that's not relevant in this case.
It seems that the contribution they you had made to your traditional IRA is not an excess contribution but was simply a nondeductible contribution.
