Nomenclature for stock symbols isn't standardized. Brokers and web sites use a variety of suffixes for non standard symbols. This is particularly maddening for preferred stocks. Fortunately, securities have CUSIP numbers so that other than infrequent human error, ACAT transfers operate efficiently.
To demonstrate the insanity of web site nomenclature for preferred stocks, here's an example for an Alabama Power preferred stock:
QuantumOnline - ALP-Q
S&P - ALP-Q
NYSE PR ALPPRQ
NYSE Amex p ALPpQ
Bloomberg /P ALP/PQ
Charles Schwab /PR ALP/PRQ
E-Trade p ALPpQ
Fidelity PR ALPPRQ
Google Finance - ALP-Q
JPMorgan PR ALP PRQ
LPL Financial ' ALP'Q
MarketWatch .PR ALP.PRQ
Quicken PR ALP PRQ
TD Ameritrade - ALP-Q
Vanguard _p ALP_pQ
Yahoo! -p ALP-pQ