Correct the phase difference figure notation

The phase diff figure had some minor errors. The glossaries had
shortened MB acronym.

glossaries.tex

@@ -50,7 +50,7 @@
 \newacronym{gui}{GUI}{Graphical user interface}
 \newacronym{cli}{CLI}{Command-line interface}
 \newacronym{posix}{POSIX}{Portable operating system interface}
-\newacronym{MB}{MB}{Mega-Byte, unit of digital information}
+\newacronym{MB}{MB}{Mega-Byte}
 \newacronym{bsd}{BSD}{Berkeley Software Distribution}
 \newacronym{iec}{IEC}{International Electrotechnical Commission}
 \newacronym{pcb}{PCB}{printed circuit board}

problemexpres.tex

@@ -256,7 +256,7 @@ Model			& GL-iNet 6408A / 6416A \\
 \hline
 \gls{cpu} & Atheros 9331, 400 \gls{mhz} \\ 
 \hline
-\gls{ram}	& DDR 64\gls{MB} \\ 
+\gls{ram}	& DDR 64 \gls{MB} \\ 
 \hline
 \gls{rom}	& \Gls{flash} 8\gls{MB} (6408A) / 16\gls{MB} (6416A) \\ 
 \hline