'Forcing' the Turbo to follow instructions

This might be a prompt question, but I find the chat prompt more readily follows my instructions during a prompt.

I use ‘instructions’ in the GPT builder for an assistant, I get rather long delays and it often doesn’t follow instructions.

Example; I ask it to batch results and at the start, just visit a max of 3 websites to try and return basic information. I can then clearly see it visiting more. Sometimes it times out it goes so long. There are other things too, but anyone have any hard and fast tips to MAKE IT follow instructions? Tnx