SIGNS- Can't type a full line of text when using colors

When using § to change the color of text, I cannot type the full 15 letters of text due to the "§" being included in the line. Instead, I can only type 13 letters. When I try to do more than one "§", such as bold white text (§l§f), I am then limited to only 11 letters, and so on. (This is a huge problem for me as every sign in my world is composed of white and other colored text).

Steps to reproduce:
1) Create a new sign
2) Use the § technique to change the text color. Try doing a color then making it bold then italic. (§1§L§O)
3) Type a line of text. Instead of 15 characters, in this case you would only be able to type 9.