contractors - Is the J-channel in my siding installed correctly? - Home Improvement Stack Exchange

I am looking to find out if the trim on my currently-being-re-sided house is being done correctly or if it is as wacky as it looks. One piece looks like it's installed upside down. Wait, wait, are

The siders face nailed the siding at the top, I'm assuming there is a much better way to do this? - Home Improvement Stack Exchange

Sealing metal siding against window j/c channel? - Home Improvement Stack Exchange

J-channel Vinyl Siding Trim at

air conditioning - How Should I Reuse or Replace this Ductless Lineset Cover? - Home Improvement Stack Exchange

sealing - Is this gap between foundation and siding supposed to be here? If not what should I fill it with? - Home Improvement Stack Exchange

vinyl siding - J Channel Looks Wrongly Installed And How To Fix (Water Leak) - Home Improvement Stack Exchange

Vinyl siding j channel HELP!!!

contractors - Is the J-channel in my siding installed correctly? - Home Improvement Stack Exchange

Vinyl siding j channel HELP!!!

Vinyl siding j channel HELP!!!

flashing - Should I use silicone caulk on the side of a deck ledger? - Home Improvement Stack Exchange

leak - How can I prevent J-channel from directing water behind siding? - Home Improvement Stack Exchange

Contractor hid mistake (damaged siding/j channel while installing window) then fixed. Does this look right now? : r/HomeImprovement