Aria Scale body fat

So I've got the Aria Scale which shows body fat %, now i know these aren't accurate as such but they should roughly be accurate right?
Ive had it for about a week and it shows that I've lost about 4 lb however my body fat has gone up 1% :/
I think I've been walking a lot more than i used to so surely my body fat could not have gone up? especially with the weight loss.

opinions?
Am i just being silly and does 1% not matter at all?

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