My friend, DOT rules require you to log all time at any and all jobs in any and all industries in your log book, and supply copies of those logs to both FXF and to any other employer in our industry. Even if you work for Mickey D's flippin' burgers part time, that counts against your hours of service at FxF. It also counts against your 14 on any given day, and against your log resetting on your days off. Don't believe? Ask the FMCSA, they'll be glad to explain it.
West has a policy that requires you to request permission to work another job in any capacity anywhere, yes, even Mickey D's. The time has to be logged accurately, and cannot interfere with your work assignments at FxFw.
You're allowed 70 hours between resets at all compensated employment, not just employment in the truck.
Jeff