Leaking septic

[Beethoven]

Hi everyone, this is my first post here. I bought my first home last November and have had problems with my septic tank since. It's a closed tank (no weeping field) of 1500gal. The previous owners emptied the tank on Nov 15th and I took possession on the 28th. By the 23rd of December it was full. I was finally able to get the previous owners to pay for the repairs. A local company has added a riser, which didn't stop the water entering and more recently changed the drain pipe. This has definitely helped but I am concerned that the water is still getting in because when I removed the lid for inspection there is a drip every ten seconds or so. Is it normal for there to be some dripping due to condensation or is there reason for my concern? Thank you