You're not the only one who's confused. If your husband is an employee (rather than a self-employed contractor) he's entitled to 28 days paid leave every year (assuming that he works for either 5 or 6 days per week). If the two weeks holiday he's just taken formed part of that leave then there shouldn't be any gap in his pay at all.
I'll assume that he took his holiday for the fortnight after Fri 11 November. Then here's what should have happened:
Fri 11 Nov: Paid for week's work ending 4 Nov. (He's got that. No problems)
Fri 18 Nov: Paid for week's work ending 11 Nov. (That was the first of the two week's pay he received while on holiday, So, again, no problems)
Fri 25 Nov: Paid for week's holiday ending 18 Nov. (That was the second of the two week's pay he received while on holiday. Once again, no problems.)
Fri 2 Dec: Paid for week's holiday ending 25 Nov. (That seems to have gone missing! COMPLAIN!!!)