Bugs in Filtering Courses

**Problem**
The current implementation of the filtering section on the course page is encountering multiple bugs, particularly when attempting to apply more than one filter simultaneously. This leads to undesired behavior and a lack of reliability in the filtering process.

**Objective**
The goal of this issue is to address the existing bugs in the course filtering functionality, ensuring a seamless user experience even when applying multiple filters. It's important to note that the backend is assumed to be free of issues.

**Proposed Solution**
Investigate and rectify the bugs in the filtering section to handle multiple filters more effectively. Ensure that applying multiple filters does not result in unexpected behavior, and the filtering process remains accurate and intuitive.

**Expected Behavior**
- Users should be able to apply multiple filters without encountering errors or inconsistencies.
- The filtering functionality should accurately display courses that meet the combined criteria of the applied filters.

**Note to Developers**
While addressing this issue, prioritize the stability and accuracy of the filtering functionality. It's essential to create a robust solution that ensures a smooth experience for users applying multiple filters on the course page. If you encounter challenges or have questions, feel free to engage with the project community for collaborative problem-solving.