I have found that the FCC's database for Canadian stations is often inaccurate or out of date. For instance, they still show CBLFT on 20 (actually 24) and CBLT on 64 (actually 20). They show City at 900w (now 1200w) and the still-to-come CFTO-DT at 550kw when the application was only for 17.4KW.

As far as I can find out from the CRTC, there is no application for CHEX-DT. HOWEVER, it's possible CHEX-DT has been assigned channel 34 if and when they decide to go digital.