trailing slash problem

Hi everyone,
Here is my problem:
https://leadingchair.com/lp422/
This is redirected by “Redirection” plugin to the following:
https://leadingchair.com/engine-chair-for-stairs/
This is fine but the following URL(without the trailing slash)
https://leadingchair.com/lp422
redirects to (Wrong)
https://leadingchair.com/lp422_try/
How to force always the redirection to
https://leadingchair.com/engine-chair-for-stairs/
This is how it looks like in the plugin settings:
/lp422/
https://leadingchair.com/engine-chair-for-stairs
Thx

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