need help with export license, IEC

I run a Proprietorship firm. I am a web designer. My work is designing and setting up websites for overseas people and companies.Everything goes online.

I got my IEC number recently on my firm name, under type of export "merchant exporter".
Actually I wanted to get my IEC number under export type"service provider".

I don't have service registration certificate so they gave me an IEC under "merchant exporter".

I want to know whether I come under type of export "merchant exporter" as I already told that I provide web design services.

Will there be any problems in future If I continue with "merchant exporter" license.

Do I require to get all my Export Invoices certified from STPI.

Thanks in advance.