InvokeRepeating continuously running twice

Running InvokeRepeating for some reason runs my function twice (I see the timer take values of 2, 4, 6, 8, and from the results i get it seems that my whole function gets called twice before printing out in Update

In start I call

 InvokeRepeating("MatchUpdate", 1, 1.0f);
 

which is:

 public void MatchUpdate()
     {
         test = timer;
         HPos = false;
         APos = false;
         HPS = HMor * 0.1f + HCoa * 0.2f + HDef * 0.2f + HMid * 0.5f;
         APS = AMor * 0.1f + ACoa * 0.2f + ADef * 0.2f + AMid * 0.5f;
         Possession = HPS / (HPS + APS) + Random.Range(-5, 5);
         BPos = Random.Range(-5, 5);
         if (BPos <= Possession)
             HPos = true;
         else
             APos = true;
 
         HPass = 0.25f * HCoa + 0.55f * HMid + 0.1f * Random.Range(0, 100) + 0.1f * HMor;
         APass = 0.25f * ACoa + 0.55f * AMid + 0.1f * Random.Range(0, 100) + 0.1f * AMor;
         HDefend = 0.3f * HCoa + 0.4f * HMid + 0.25f * HDef + 0.05f * Random.Range(0, 100);
         ADefend = 0.3f * ACoa + 0.4f * AMid + 0.25f * ADef + 0.05f * Random.Range(0, 100);
 
         HShoot = 0.6f * HAtk + 0.1f * HMor + 0.3f * Random.Range(0, 100);
         AShoot = 0.6f * AAtk + 0.1f * AMor + 0.3f * Random.Range(0, 100);
         HBlock = 0.7f * HDef + 0.2f * HCoa + 0.1f * HMor;
         ABlock = 0.7f * ADef + 0.2f * ACoa + 0.1f * AMor;
 
         if (HPos)
         {
             StatHPos++;
             Pass =  HPass - ADefend;
             if (Pass <0)
                 Pass = 0;
             if ((Pass + 10)  >= Random.Range (0,100))
             {
                 StatHShoot++;
                 if (HShoot - ABlock >= 0)
                 {
                     StatHGoals++;
                 }
             }
         }
         else
         {
             StatAPos++;
             Pass =  APass - HDefend;
             if (Pass <0)
                 Pass = 0;
             if ((Pass + 10)  >= Random.Range (0,100))
             {
                 StatAShoot++;
                 if (AShoot - HBlock >= 0)
                 {
                     StatAGoals++;
                 }
             }
         }
         timer++;
     }

And I print out stats/results via another script, which get printed after every 2 calls of MatchUpdate. (Also I used the public variable "test" to monitor timer, and in the Inspector it still looks like it's getting called twice every time)