This is not a glitch in TurboTax and the information you received from CRA was correct, but they neglected to state that only certain types of EI Benefits qualify as "earned income" for the Childcare Expense calculation. 

Regular benefits from Box 15 of the T4E do not qualify, whereas amounts in Box 17 of the T4E - Employment Benefits & Support Measures do.

I've attached a screenshot of the CRA Income Tax Folio information, as well as a link to that particular IT Folio.