Yes, all of your traditional elective deferrals and Roth contributions at the second employer are excess contributions.
The statutory deadline for obtaining a corrective distribution is April 15 of the following year, not the due date of the tax return for that year. The April 15, 2023 deadline for obtaining a corrective distribution has passed, so the excess traditional elective deferral to the second employers plan must be included in income on your 2022 tax return because the employer excluded that amount from box 1 of your W-2 and must appear on Form 1040 line 1h. When eventually distributed, both the traditional and Roth excess contributions and their attributable earnings will be taxable, resulting in double taxation of the excess amount. Regular distributions from the traditional 401(k) will naturally be taxable but you'll need to keep track of your Roth excess and attributable earnings so that they can be appropriately taxed when distributed. When making distributions, the excess amount and attributable earnings come out first and are not eligible for rollover.
