I have to agree with the other posts on here, the foods you ate are not considered soft foods. Foods like yogurt, tuna salad, mashed potatoes...And I would not ever recommend eating some of those foods after this surgery. The potatoes and biscuit can swell and make you very uncomfortable, to the point where you may throw up or worse, have to have the Fluid removed from your band, after you reach those points. Also, I think it is normal to not feel any restriction right after surgery, as there is no fluid in the band. It is unlikely that the band has slipped this early on, so I think you are perfectly fine in that reguard.
Don't worry, you will do great after you start getting your fills. You should get in the habit of eating foods that are high in Protein, fruits and veggies, no grains(bread, rice, pasta) because they may not agree with your band and may make you sick. I hope this helps and I wish you luck on your weight loss journey!