i dont understand how my triglycerides can be so high but my cholesterol and hdl,ldl are normal ranges
There's a connection between high triglyceride levels and diabetes. Did they check you for diabetes? Also, sugar and grains and require insulin secretion, which is a potent stimulus to the liver to produce triglycerides, and sugars and grains must be reduced if you are looking to lower your triglycerides.
High triglycerides in the blood are often seen in overweight people. But even people who are not overweight may have stores of fat in their arteries as a result of insulin resistance. These triglycerides in the blood are the direct result of carbohydrates from the diet being converted by insulin. These triglycerides do not come directly from dietary fats. They are made in the liver from any excess sugars which have not been used for energy.
Fortunately, elevated triglycerides is one of the easiest problems to correct with the appropriate diet. Simple restriction of all sugars and grains.