One Side lower than the other

Try jacking the trailer up higher while hooked to the truck before you start to draw up the chains. It won't hurt the truck or trailer at all. You should raise it high enough so that you can easily put the chains on the hook and draw them up. It will seem very odd at first and you will think you are going to break something , but it is fine and is the proper way to do it. If you have an electric tongue jack then the job is almost effortless. The higher you jack, the easier it will be.
If not, then look at it as an opportunity to get a little exercise in before you travel.

Do the same for unlooking also - much safer that way.
You always want the same number of links under tension on each side.
Barney

Thanks for responses wasn't sure if I could adjust the one side more than the other or if it would be a safety issue . I have a hard enough time keeping the chain on the hook on the DS when trying to snap it up

Try snapping up the other side first, see if that changes anything.

When attaching trailer to tow vehicle, is the rig on a hill (side-to-side)? My driveway has a slope. It's 35 feet wide and has a 4 inch slope side to side. My trailer and truck are always off kilter in my own driveway.

Talk about the number of chain links that are under tension. There should be a minimum of 5 on each side. Those are the links between the snap-up hook and the WD bar.

Not all manufacturers put the same number of chain links on their bars so telling how many you have left over - not under tension - does not help members know how tight your bars are.
Barney

Try pulling them a little tighter. Might even the TV up some. If I am visualizing it right. 6 links is not very tight. I hang 3 links over the top of the snap ups