Ok I have a fun story from work, but its not overheard since (sorry). I work for a very small company (30 people), and I arrange a 401k frontload situation with the guy who does payroll (a lawyer, not an accountant). We make it so I'm still contributing an amount from my regular paychecks to receive the full match, and I'm told I won't receive a match on the 401k front load. Its all well and good until I get my bonus paystub and see I was matched a seemingly random amount. We go back and forth for about a month where he's trying to tell me how he calculated it but his calculations don't match my numbers. Finally he tells me that he matched me based on the percentage of the max 401k contributions. Meaning he did (my frontload/18,000) = x%, and the x% was applied to the max match I could receive based on my salary. I then tell him that my paychecks are still getting matched for the max amount, and if that continues then in May they will have over matched me. He tells me that he will stop matching my 401k contributions when I reach the max match. At this point I stop trying to figure out his reasoning behind this method, and just decide to audit all my paystubs to make sure I am receiving the correct match. Not a super crazy story, but sometimes I still scratch my head and wonder why he came up with this random 401k match payment plan. It makes 0 sense to me.
In summary: payroll guy says my frontloaded 401k contribution won't be matched which turns out to be a lie. He matches 401k frontload by an arbitrary amount, can't explain to me why it was done that way, and then matches less than half my paycheck contributions throughout the year.