NodeJs splicing object from array before save() issue

Trying to delete an object from an array list, after being .splice() then save it to DB. Though it's splicing the correct index but not saving it correctly, if I splice index 0, its actually deleting index 1 in the DB, probably because of the object has been spliced first therefore it's saving the wrong object.

var user = 
  {
   "request": [
     { "name": "test1", "url": "test1.com" },
     { "name": "test2", "url": "test2.com" }
   ]
  }

Splicing it and saving

let xd = user.requests.indexOf(acceptOrdeny);
user.requests.splice(xd, 1);
user.save(callback);

full code logic --

 User.findOne({ _id: currUser._id }, function (err, user) {
        if (err) throw err;
        /* acceptOrdeny is the req.body object
         checking if the key accepted==true then push acceptOrdeny object to friends[], splice from request[] then save to DB 
        */
        if (acceptOrdeny.accepted == true) {

            user.friends.push(acceptOrdeny);
            let indexReq = user.requests.indexOf(acceptOrdeny);
            user.requests.splice(indexReq, 1);
            user.save(callback);
            console.log('accepted', indexReq)
        }
        /* 
         checking if the key accepted==false remove from requests[], then save current array[] list
        */
        else {
            let xd = user.requests.indexOf(acceptOrdeny);
            user.requests.splice(xd, 1);
            user.save(callback);
        }
    });

I have tested splice the object manual like, this is fine but splicing them dynamically using indexOf is not quite right.

user.requests.splice(0, 1); // delete first obj in the array 'test1'
user.requests.splice(1, 1); // delete 2nd obj in the array 'test2'

Is there a better way of deleting the object in the obj[] list then save it back to the DB?

via MrNew