I can see that two sets of PNG files were created Gslide and Gchart output.
I am wondering why you have gsfmode=append in your options. I haven't used that option with ODS output but it was originally designed to send multiple graphs into a single file formatted for display i.e. printer specific commands and may be related to single output but not in the intended manner.
I would be very tempted in a troubleshooting mode to remove the GSFMODE option and make a test version of your macro to just the gslide bit. Then if that works go back to the full macro, if it doesn't there's a smaller set of things to look at. You may also have to look for other ODS options that snuck in.
It may also be that you could switch to the SG graphics procedures. Since it looks like you are using Gslide just to put a line of text then the ODS TEXT statement may be sufficient.