Input Field shortening string when used with Mathf.Clamp?

Hello, I am working on a project that has an input field used for numerical input. I'm having a problem where the input field is shortening the number string Mathf.Clamp is assigning to it.

Here's the function that runs OnEndEdit:

 //Calculate the maximum amount of this item the user can buy
 int maxAmount = currentMoney / itemPrice;

 //Clamp the value they entered between 0 and the max
 int newAmount = Mathf.Clamp(Convert.ToInt32(enteredNumber), 0, maxAmount);
 Debug.Log(newAmount);

 //Assign the newly clamped value
 inputField.text = newAmount.ToString();

Based on the debug statement, newAmount is calculated correctly every time, but if Mathf.Clamp shortens it to three characters it keeps dropping the last character.

So for example:

 Max value = 400
 Player entered 500
 Value is clamped to 400
 Input Field has a value of 40
 
 Max value = 400
 Player entered 300
 Value isn't clamped
 Input Field has a value of 300

The input field has its "Content Type" property set to "Integer Number", and the "Character Limit" is set at 3. I'm guessing the character limit has something to do with it, but that doesn't explain why it only has problems when the number is clamped. It also only has problems when the number is 3 characters (the limit). It never seems to have a problem with any number below 100.

I'm really stumped on this one and was wondering if anyone has encountered this or if it's a bug of some sort.

Oh, I'm using Unity 5.3.5.

Thanks.