Guild Wars 2

I added all the Items I am Wearing Together. (+Druid Shoulders)
I have a Total of 908 + Druid Shoulders which Equals 942.

This game is telling me I have 1,732.

From what you posted (+34 from shoulders) I only get a sum of 728 thoughness (+1000 base). Did you add the stats of both weapon sets together ? (Because it doesn’t work like that).
Also your picture shows only 1.5k something toughness, so I assume you might have been downscaled ? (Scaling also affects your actual attributes)