I had a similar problem- they are STICKLERS for making sure all your info matches, and they also know if you try to set up a new account and forward to a number already used for forwarding.
They catch you on either one of these and BOOM your account locked and they want your personal info.
I like the target phone idea- might try that one.
If you plan on keeping your ebay accounts, I think it's a good idea to keep the phone numbers. You just never know when you might need to "verify" again. It's good insurance for your ebay account IMO
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