Two switches in room now 'reversed'
A couple of weeks ago I replaced a standard on/off switch with a digital timer from Home Depot. After a lot of trial and error, I got it to work.
Today, I noticed that two switches that share the same circuit (but are unrelated) are now reversed so that down is on and up is off.
Sounds weird but I would have sworn they were fine for the last two weeks, but it's possible I just never noticed the reversal.
Anyway, any theories on what I did wrong when I installed the switch.
If I remember correctly the original switch had two black and one green wire. I can't remember how I handled the two black wires but I do remember that I joined the white cable from the switch to the several white cables in the box via a wire nut.
Any help is appreciated!