Unexpected payroll related transactions in the check register.

I discovered two unexpected, uncleared transactions while reconciling the bank statement successfully. These transactions are as follows:

1. The check register contains an additional "Check" (not a "Paycheck") without a check number, for an "Employee" (not a "Vendor".)

This check has a date that is two days earlier than the proper paycheck date. The check detail lists several payroll tax-related accounts but does not show a payroll period. The check amount is $77.38 more than this employee's properly recorded (and cleared) payroll check.

2. The check register lists a second "Check" for the retirement account withholdings/contributions paid to our broker. The duplicate check does not have a check number. The proper broker check cleared the bank as usual.

Two questions:

1. Can I safely delete or void these two transactions? I need to schedule payroll tax payments, but I'm concerned the duplicate check in #1 above will cause excess tax liability.

2. We've been using QB for over 20 years but are new to QB Online (just one year). What did you we wrong? This is the first time we've had this problem.

Thank you for any help you can provide.