Sounds all normal.
I'd invest in a fresh new cap tho - straight 16#.
Watch the upper hose to be sure it doesn't collapse with an overnite cool down - if it does, the tube to the overflow tank is blocked, but you said the level goes up/down, so that should be ok.
Look around the top/front of the engine to see if you can tell if any gasket changes, non-factory adhesives, etc.
I'd invest in a fresh new cap tho - straight 16#.
Watch the upper hose to be sure it doesn't collapse with an overnite cool down - if it does, the tube to the overflow tank is blocked, but you said the level goes up/down, so that should be ok.
Look around the top/front of the engine to see if you can tell if any gasket changes, non-factory adhesives, etc.