I have a scratch 1.4 account registered under a different name, and projects under this account that won't show up on scratch 2.0 please help me!

When were these projects made? As the projects in 2.0 are a backup of the 1.4 ones plus the new projects (those created in 2.0), yours may not whow up.

Did you create it 2 days before 2.0 came out?