If you accounted for atmospheric pressure it should be good. Light syrup is common on a first run, you should have your highest sugar content in the first few weeks of sap collection. The complex nature of syrup colour, taste, clarity from batch to batch are incredible....search it on this site when you want some light reading material ;-)

Try this App the next time you finish a batch: https://www.saptapapps.com/ it saves boiling water for an hr while getting your thermometer calibrated.

I bring mine over temp (thicker than syrup) in the evaporator, let it settle for a week, decant it into my finishing pot, bring it to temp and thin it out until the specific gravity is spot on, then bottle. Way faster during finish.