POLISH: Fix Bugs, Minor Details, Cleanup unused files, and Edge Cases

[superspike7]

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• [x] #158
• [x] #151
• [x] #152
• [x] #149
• [x] #141
• [x] #137
• [x] #136
• [x] #138
• [x] #139
• [x] #130
• [x] #134

[superspike7]

@EJamesssss @danica02 @reyolan @superspike7

pa dagdag lang ng mga nakita/makita nyong bugs or need ng polish.

these tasks are minor lang and not a priority.

maybe after all the tests are written then saka na natin to taposin lahat if ever mahabol pa.