Gio & Custom Scroller Strings

I have a Gio running 2.0.1. For my last show I patched the scrollers (Apollo SmartColor Pro 7.25s) according to the way we have them set up (Colour at DMX xxx, fan @ xxx+1 and reset @ xxx+2) using the "PL1 RST" variant of the fixture.

Next I attempted to create a custom scroll for them, which has 16 frames. The first problem, which I can work round is that the desk insists on putting a "clear frame" at the beginning of the string. Since my first frame is Lee130 this isn't a major problem, but may be in the future. How can I avoid this?

The more significant problem is that the desk automatically adds 2 frames to the end of the string, regardless of what I entered. This means that the direct selects are all significantly out, and also means that I can't seem to calibrate the strings properly. I used colour palettes as a work around, but it would be nice to solve this for future shows.

How can I tell the Gio how many frames the string has? Is this a desk issue, or a fault of the fixture library?

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