Odd Stem Lengths

[Ed Ardzinski]

I have a sections with quints in my piece, and in 2 different blocks of the piece the PDF output varies.
 
I've attached pictures of the output - the same exact code produces each part...same variable and transpositions.  I am in an old version (2.6.5) but I'm never run into this without having chord names creating spacing.  This is a fairly simple file, with just a RH and LH part for a piano, but not using a piano staff.  The first instance happens in the II part, it has the bad stem lengths.  THe second instance is in the II part, and outputs looking good.  The
 
\transpose c c' \hpianoIIb
\hpianoIIb
 
part is in other parts of the piece and outputs fine.  Any ideas would be helpful.  Thanks!
 
rhII =
{
\hpianoIVb
\time 4/4
%% odd section begin
\transpose c c' \hpianoII
\hpianoIIa
\hpianoII
\transpose c c' \hpianoIIb
\hpianoIIb
%% odd section end
\hpianoI
\time 5/4
\hpianoIV
\hpianoIV
\hpianoIVy
}
rhIII =
{
\hpianoI
\hpianoII
\transpose c f \hpianoI
\hpianoII
\transpose c g \hpianoI
\hpianoII
\hpianoI
%% odd section begin (prints OK this section)
\transpose c c' \hpianoII
\hpianoIIa
\hpianoII
\transpose c c' \hpianoIIb
\hpianoIIb
%% odd section end
\hpianoI
\time 5/4
\hpianoIVz
}

Bad Stem Lengths.png
Description: PNG image

Good Stem Lengths.png
Description: PNG image