Cigna only paying me my earned income instead of base income

Hi. Make a long story short I answered my back when I was 16 years old blue a discount been dealing with pain ever since. I started working with a company in 2004 had to have neck reconstructive surgery in 2011 triple fusion now the upper and lower joints disc are messed up along with facet disease and osteoarthritis and pains through the rack area and lumbar area. Now I’m out because I’m short-term disability because my left arm I pulled a nerve and I’m out for that and neck and back pain and migraines. This pain constant for years and years and I was just wondering I’m getting short-term disability through New York Life now but they’re short change a man only paying me my earned income rather than my base income that was listed in our annual enrollment was base pay. I think my company is under reporting my base pay and saving millions. One of the biggest employers in Vegas. I am sure that I will have problems in the future from New York Life going long term