Why WDSC wants to push in all my programs?

I have a couple dozen COBOL and CL programs sitting on WDSC 7, all of them
living under Subversion. I normally work with the "iSeries Projects"
perspective.

I have noticed that sometimes when I compile a program, WDSC wants to push
all "changed" resources to the iSeries, even if they didn't change. When I
had only a few programs it was not a problem, but now, every time I do a
compile it wants to push most (maybe all the objects), and that takes a
while.

I guess this is happening because Subversion may be updating the date/time
stamp on my local files.

Another note: I checked my project properties, under iSeries Build, and it
is set to "*NONE".

Any ideas or suggestions to avoid the automatic push to the iSeries?

Thank you all,

Luis