Upvote:1
Unfortunately system errors such as those you witnessed can happen. To minimise the risk of these happening again in the future, the best thing you can do is double check all the information you input, before submitting the application. In addition, you can use the section at the end of the application and/or a covering letter to provide further details on the information you submit. This will help you solve points 1) and 2).
Point 3) is the crucial one. The purpose of bank statements is to demonstrate that you lead a stable life, and that you can support yourself during your stay in the UK. There are several money flow patterns which are likely to trigger red flags. Typically, an account showing irregular incoming cash flows is likely to be construed as funds parking, as well as demonstrating an erratic/unstable lifestyle. Unfortunately, as you point out, your job as an import/export businessman, inherently causes you to have irregular cash flows in your accounts. This is nothing to be worried about, as long as you can explain the reasons for such erratic deposists, and the provenance of the funds. To do this you can provide a list of documents, including but not limited to:
The more valid supporting information you provide, the easier it is for the immigration officer to make a decision on your application.