I've had a single developer account for many years that is separate from my iTunes account. But with the latest update to the site, every time I try to download anything it redirects me to the Apple ID page to validate my primary email address. This doesn't work because it is the same email address as my iTunes account and it complains that the email address is in use.
Obviously I cannot delete either account, and shouldn't have to create some dummy email account somewhere just to fix this.
If we're required to only have a single account on apple now, shouldn't there be some way to merge these old accounts?