There are other problems here, but let me first take perhaps the most problematic of these, #5.

A C7alt means that neither the fifth (G) nor the ninth (D) appears unaltered. So, it could be a flat five (Gb), a sharp five (G#), a flat nine (Db) and/or a sharp nine (D#). You would have a C root. You would also have, as you mentioned, the minor seventh (Bb). There would be no G, but there could be a Db. And it's not a suspended chord.


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