I may be wrong, but I think the 'alias' feature only applies if one of the multiple profiles is registered as 'Seeking Services'?
The thing I think you might have problems with is your phone number, if you were showing it. I can't remember the details, but I'm sure one of the ladies here had awful problems when she tried to reregister and use the same one because it was already in their system somewhere, ditto email addresses. To be fair, you can set up a new email easily enough and a SIM card costs 99p in Tesco, so hardly an insurmountable obstacle if your old number isn't advertised elsewhere
.