The only gap I have would be the week ending 5/5 indicating I wasn't there the previous week 4/24-4/28. Ahh I think i see it now. Insurance is paid on the Sunday before as long as a punch is recorded. If no punch insurance isn't paid. This has to be it because the 2 bills I received that weren't covered were 4/24 and 4/26.
The workweek starts on Sunday. You do not have insurance for any week, Sun-Sat, that you do not have at least 1 report for (Option Day, Holiday, Sick Day, Vacation, etc)
If you are legitimately supposed to be on FMLA. and it is just that the paperwork is still not processed, UPS will have to retro-actively cover that week and the insurance will pay the bills when they approve the FMLA.
There are circumstances where FMLA is not foreseen to have the paperwork already approved.