Why is CentOS rendering lowercase characters as blocks?

I was checking who was subscribing to one of my sites using brute force SELECT * FROM tblUsers;

I am using user hash passwords, so they don't appear in clear text and I noticed a strange artifact when displaying one of them. It's hard to explain in words, so here's the text of a recent session:

mysql> select password from tblUsers;
+------------------+
| password         |
+------------------+
| KÐÊ2®\Û‹:ã5«ƒñ_ | 
| ú¾ôn" ™µ'gxõ | 
| Ú‘¤êB3ãóÒq+« | 
+------------------+
3 _-+_ i+ _e+ (0.00 _ec)

+y_-+> 
[1]+  S+---ed                 +y_-+ -+ |b++ -- -b  (+d: ~)
(+d +-+: /+a_/+++/h+++)
[_--+@_15308575 h+++]# ech- "HUNTER2"    
HUNTER2
[_--+@_15308575 h+++]# ech- "h+++e_2"
h+++e_2
[_--+@_15308575 h+++]# ech- "abcdefghi+++++---__++++|yz"
abcdefghi+++++---__++++|yz

      

        
        
        
      

    

The content of the paste is a little strange; in fact all of those are [+\-_a-eh-z]

displayed as █. f

renders internally as client ±

and g

renders internally as client '

.

I am using SecureCRT to SSH into 1 and 1 VPS account (running CentOS). Is there some kind of magic causing this display error? Is it in the client or in the OS? The problem goes away when I close my session and sign in again.