pan and tilt options in fixture library

I have a new LED wash fixture with zoom that's not in the fixture library.  So I made one.  However, when I just use "Pan" and "Tilt" it do those things, but suuuuuuuuuper slowwwwwwww.  If I changed to Pan 2 and Tilt 7 for instance, it worked, but had a lag in starting when using the encoder.  The best way I found so far was Pan Mode and Tilt Mode.  So my question is what are all the different Pan and Tilt options in fixture creator for?  And why???

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