Thanks for the listing. With your project structure i could reproduce the bug.
The xml you have posted contains a error:

</Project><Project><Project><Id>25199e9a-ea4b-462e-8534-1c8e3e434d23</Id><Title>recast

It seems like the project tag contains a project tag. When Wieldy loads the data, it skips part of the file. I have fixed the xml in the file and all projects are correctly display:

  <Projects>
    <Project>
      <Id>12e3d773-6a16-4b7b-ab7a-1f591a589403</Id>
      <Title>work</Title>
      <Color>
        <Red>245</Red>
        <Green>0</Green>
        <Blue>0</Blue>
      </Color>
      <Tags />
      <Parent xsi:nil="true" />
    </Project>
    <Project>
      <Id>081fd381-167d-43f7-83de-84a89c522554</Id>
      <Title>research</Title>
      <Color>
        <Red>0</Red>
        <Green>255</Green>
        <Blue>0</Blue>
      </Color>
      <Tags />
      <Parent xsi:nil="true" />
    </Project>
    <Project>
      <Id>10114e42-aaec-4950-881b-4bed738dd00f</Id>
      <Title>network</Title>
      <Color>
        <Red>188</Red>
        <Green>0</Green>
        <Blue>188</Blue>
      </Color>
      <Tags />
      <Parent>081fd381-167d-43f7-83de-84a89c522554</Parent>
    </Project>
    <Project>
      <Id>a8d1f5f9-5f24-4f60-8e5d-93c21047051b</Id>
      <Title>multithread</Title>
      <Color>
        <Red>255</Red>
        <Green>255</Green>
        <Blue>0</Blue>
      </Color>
      <Tags />
      <Parent>081fd381-167d-43f7-83de-84a89c522554</Parent>
    </Project>
    <Project>
      <Id>3a750d9a-cc24-4fc3-b555-dfc34e512b22</Id>
      <Title>ai</Title>
      <Color>
        <Red>0</Red>
        <Green>0</Green>
        <Blue>188</Blue>
      </Color>
      <Tags />
      <Parent>081fd381-167d-43f7-83de-84a89c522554</Parent>
    </Project>
    <Project>
      <Id>fa45c530-5919-4ec3-836e-9e1b1caf4b36</Id>
      <Title>behavior</Title>
      <Color>
        <Red>0</Red>
        <Green>113</Green>
        <Blue>188</Blue>
      </Color>
      <Tags />
      <Parent>3a750d9a-cc24-4fc3-b555-dfc34e512b22</Parent>
    </Project>
    <Project>
      <Id>7aa40e66-e061-423d-88d2-24852ac29cca</Id>
      <Title>animation</Title>
      <Color>
        <Red>0</Red>
        <Green>139</Green>
        <Blue>229</Blue>
      </Color>
      <Tags />
      <Parent>fa45c530-5919-4ec3-836e-9e1b1caf4b36</Parent>
    </Project>
    <Project>
      <Id>35cf3b51-fbdb-4ea7-8651-e5fd3a0e5e87</Id>
      <Title>navigation</Title>
      <Color>
        <Red>0</Red>
        <Green>76</Green>
        <Blue>106</Blue>
      </Color>
      <Tags />
      <Parent>fa45c530-5919-4ec3-836e-9e1b1caf4b36</Parent>
    </Project>
    <Project>
      <Id>25199e9a-ea4b-462e-8534-1c8e3e434d23</Id>
      <Title>recast</Title>
      <Color>
        <Red>0</Red>
        <Green>160</Green>
        <Blue>218</Blue>
      </Color>
      <Tags />
      <Parent>35cf3b51-fbdb-4ea7-8651-e5fd3a0e5e87</Parent>
    </Project>
    <Project>
      <Id>b9270cff-1677-471d-be38-09518f350552</Id>
      <Title>rvo2</Title>
      <Color>
        <Red>0</Red>
        <Green>196</Green>
        <Blue>213</Blue>
      </Color>
      <Tags />
      <Parent>35cf3b51-fbdb-4ea7-8651-e5fd3a0e5e87</Parent>
    </Project>
    <Project>
      <Id>a25a3b1c-e648-4b07-be0f-a8c34a85b96b</Id>
      <Title>steering</Title>
      <Color>
        <Red>0</Red>
        <Green>120</Green>
        <Blue>145</Blue>
      </Color>
      <Tags />
      <Parent>35cf3b51-fbdb-4ea7-8651-e5fd3a0e5e87</Parent>
    </Project>
    <Project>
      <Id>b306b70f-e754-40b7-9433-a36c17c228af</Id>
      <Title>aigamedev</Title>
      <Color>
        <Red>0</Red>
        <Green>82</Green>
        <Blue>188</Blue>
      </Color>
      <Tags />
      <Parent>3a750d9a-cc24-4fc3-b555-dfc34e512b22</Parent>
    </Project>
  </Projects>

Did Wieldy create this incorrect XML-Data?