Tier 1 -previous earning requirement

[ssikaria]

My Husband is on Tier 1 (general). He is planning to apply for extension. He is a contractor and runs his own company. He is director and 50% shareholder of the company and draws salary and dividend. Rest 50% share holding is hold by me (wife). We are showing him as employed for Tier 1 application. In support of previous earning we are planning to submit payslips, dividend vouchers, bank statements and a letter from accountant. I have following two queries with regard to the documentation in support of Previous earninig:

1. In four months, salary as per pay slips do not match with bank statement (minor differences of £15 in three months and £100 in one month). These differences are because my husband withdraws salary as per last month payslips but in some month the net salary figures differ from the last month because of NI. This point is explained by accountant in his letter.
Whether these differences will create any kind of problem in the processing of my husband's application?

2. In Guidelines it says payslips should be stamped and signed by the employer. Whether in our case my husband should sign the payslips with company stamps (as he is the only director of the company) or his accountant should sign it with his stamp?