I booked a flight on VS for my husband and son through Expedia. On the booking I included their respective middle initials since they both have the same first and last name. On the Expedia site everything is fine but when I attempt to retrieve the booking on Virgin's website the middle initial for each has been added to the end of their first name (williama and williamc). Expedia assures me that this is will not be a problem. I chatted with Virgin who also assures me that it won't be a problem (have printed & saved the chat).
Please talk me down off of the ledge. Is this going to be a problem? It's an international flight and I know that the name on the tickets must match the name on the passport.

Thanks in advance for any help and advice.