[BUG] Deal with a few warnings

[TonyBagnall]

No description provided.

[aeon-actions-bot]

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I have added the following labels to this PR based on the title: [ $\color{#FEF1BE}{\textsf{enhancement}}$ ].
I have added the following labels to this PR based on the changes made: [ $\color{#0B1D38}{\textsf{datasets}}$, $\color{#2C2F20}{\textsf{testing}}$ ]. Feel free to change these if they do not properly represent the PR.

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[MatthewMiddlehurst]

These look innocuous, but it is difficult to tell what is changing/being resolved without the accompanying warnings.

[TonyBagnall]

These look innocuous, but it is difficult to tell what is changing/being resolved without the accompanying warnings.

tests pass, changes produce same output, tested it offline