So when I turn on the kitchen light one of the can lights flickers....just now the light stayed on after I shut the switch off. Just one light...the rest went off but they're all on the same switch. How can that be? I'm so cornfused.

Loose connection in the light that's staying on and/or bad switch.maybe??

I bet you got LED bulbs ? They are doing that in my house turn off switch and they stay on Change it ASAP Internals messing up Had one in a corner lamp arc and catch fire inside the bulb

If you're comfortable that everything is wired correctly- I would replace the switch with a LED approved dimmer switch. Although not an electrician- I believe the dimmer switch compensates for the lack of resistance within the new lamp- I added LED switches that look like the normal single pole switch but have a slider alongside to adjust voltage to the fixture.
In addition, the run rate amperage of LED's is extremely low but the inrush startup current can be 100x of your run rate amperage

Do you mean electrical?

Just change the bulb with another led Since the “world “ has gone green and led is about the only bulbs you can find junk bulbs are getting out on the shelves Simple fix and pretty common for one to stay on

i do not like led lights

Had this happen at the cabin, It was a loose neutral in the switch box.

Well I replaced the light bulb and all is well. No foul.