Sheldon, the point is that you cannot reach the £18600 threshold if you include a payslip at £1456.
That is the one the UKBA will use for their counting. Doesn't matter what the other 5 payslips say.
At the end of the day it's up to you.
Once again, here is what the rule says:-
The way the rules are written, you cannot 'make up' shortfalls in other payslips. UKBA use the lowest amount in the 6 months sequence.Category A: salaried employment for the last 6 months
Where the applicant’s partner and/or the applicant (if they are in the UK with permission to work) is in salaried employment at the point of application and has been with the same employer for at least the last 6 months, the applicant can count the gross annual salary (at its lowest level in those 6 months) towards the financial requirement.
In connection with bonuses and overtime, again here is the transcript of the rules:-
This is on the top of page 13 of the Immigration Directorate Instructions -Family Members - Appendix FM 1.7 - Financial RequirementOvertime, commission-based pay and bonuses will be counted as earnings from salaried employment.
For me this statement is clear and concise.
I feel that your MP will understand it the same as me, you and almost everyone else except one specific ECO.
But you do have a point in that this ECO has now issued a refusal against allowing bonuses and overtime and also commission-based pay.
For your information and reference here is the whole document.
Please do review it carefully.
Show the relevant parts to your MP and ask him for his understanding of the issues you raise.
Please do let us know what responses he gives you.