Normally when you click a merchant's affiliate sign-up link and register for a new E-junkie login account (or log into your existing E-junkie account), that should automatically enroll your account in that merchant's affiliate program, so you'd see the merchant listed in the Select Merchant dropdown menu in your E-junkie Affiliate Admin; however, sometimes this auto-enrollment doesn't happen for a variety of reasons, usually due to your browser cookie settings.
If you joined an affiliate program but cannot find that merchant listed in your E-junkie Affiliate Admin under Affiliate Programs > Your Affiliate Programs, you don't need to search for them among all our affiliate programs. You just need to log into the E-junkie account you already registered, stay logged in, then find the merchant's sign-up link and click that again (the same link you clicked to join their program in the first place).
Finally, bear in mind that if a merchant has removed you from their affiliate program, you would be banned from rejoining their program. The merchant can reinstate you manually at their discretion; just contact them to request reinstatement for your E-junkie Affiliate ID #, which you can find by clicking Edit Profile in your Affiliate Admin.