Fix the ui displaying last year's instructors

[SamZhang02]

this is also good on explore page now

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 86.10%. Comparing base (fbafc39) to head (b235511).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #576 +/- ## ======================================= Coverage 86.10% 86.10% ======================================= Files 45 45 Lines 6441 6441 ======================================= Hits 5546 5546 Misses 895 895 ```

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[terror]

Looking Amazing