You just wired them backwards.

Not super sure about mini pot brands but there was plenty on Amazon that seemed reasonable. https://www.amazon.com/dp/B01JLT7PN0/ref=cm_sw_r_cp_apa_i_vzPdFbG4H3MAR

Personally, I'd much rather ream out the holes a bit and use full size pots unless there's really a space restriction.