Ceiling-fan switch no longer turns off fan
Yes, you miswired. Now you need to disconnect the wires to the switch in question, figure out which is the hot feed, and make sure the switch is between that and the lines to &amp; from the fan. But since you think the left switch has changed function, it looks like you have made a hash of things.  Next time, label every line before disconnecting.
I suggest bringing in an electrician rather than risking doing something even more wrong.