Responsive Look and Additional Dollar Amounts From PayChecks Not Being Pulled

Summary

Issues where additional dollar amounts in W4 are not being deducted from paychecks

Content

We recently deployed the responsive look into our production environment.  About two weeks into it we discovered an issue pertaining to both State and Federal W4's.  In some cases when employees put down extra dollars in either the Federal or State W4, the request goes through but the additional dollars are not deducted on their paychecks---meaning the extra dollars don't go towards their taxes.  For some employees, we don't see this issue.  Has anyone else ran into this?  thx.

Craig