All you care about is that you have an e-ticket valid for each segment of your reservation. Anything else is extraneous.
An e-ticket is a 17-digit number. 3 digits-14 digits.
If all of this is unfamiliar, simply call each operating carrier and ask them to verify that there is a valid e-ticket supporting each segment of the itinerary which they operate. If there is, you will be boarded (all other things being equal) and if there is not, you will not. If there is a problem, it is FlightHub's to fix.