I just decided to give up tracking my placement. Like you, every time I look for my main gig, it jumps from one page to another to no show. I sent a message to custom support and they replied:
Fiverr is constantly making changes to improve the buying and selling experience on our site. We want buyers to find the best sellers for their specific needs. Because of this, Gigs will rotate. We are not able to guarantee that your Gig will remain in the same position. Many other sellers “compete” for the same location within search. If another seller is performing better that you, their Gig may appear higher in search results.
We use an algorithm, which takes into account multiple factors. Ratings and number of orders completed are just some of the factors we take into consideration. Unfortunately, we are not able to disclose certain criteria for our search engine, as this information is proprietary.
I am just a little bit confused about this because in the last week I tried to deliver everything a lot faster than before and all of my clients were extremely happy.
I am not sure what else I should do. They also gave me a list to reach the best possible search position.