It looks like this chain comes pre marked to assist install and only the 2nd pic has the marks lined up. This would only assist in initial assembly because the chain isn't going to land in the same place after a revolution.

If the cam tools are being properly used, that is what you need to go by. Also, be sure that TDC is actually where the crank should be when using the cam tools. In order to prevent valves hitting pistons, some engines are timed XX degrees off TDC . Some engines also have a way to index the crank with a pin / bolt.

If you haven't loosened the cam / crank sprockets, the cam tools should slide on but again, this does nothing to confirm crank position is correct.

Please expand on " ugly noises I heard while attempting to install the new tensioner the first time. " were you cranking the engine with the starter / by hand or was something else going on?