I built 7 sites, all are one page with unique content. then i submit it to 20 pr3 - pr8 sb site, and ping my profile by about 100 ping server by deamon bookmark. google index the sites in 3 - 10 hours. but 5 of them de index again. only 2 site remain indexed. http://www.vobtoavi.net is one of sites. what do I do wrong? Google take this as spam and penalty or just temportantly deindex?
I don't know what you did like pinging is doing anything, I don't quite understand, but my site get deindexed today and then get indexed again, and then deindex again. seems all the time. I haven't really look at it yet since I have about 1000 pages indexed and it goes down to maybe 700 and then 900. that pinging thing, what exactly does it do?
ping is notifiy some site like google or other big site that your site is updated and they are crawl your site. http://en.wikipedia.org/wiki/Ping_(blogging)
I think you need to wait for some time.. Google need some time to update and crawl your page.. also use google analytics to get in depth about your site..
I dont think they like to be pinged too reguarly. Ok pinging automatically when your site updates its content is one thing, pinging it 100x when it only has one page is alittle bit much imo. But I could be wrong of course. Anything to automated and erring on the irrelevant side, that eats up an SE's bandwidth (i know it doesnt touch the edges-but multiply it by 10mil and ur maybe touching a crumb or 2 -)) is probably not a good idea.
This type of fluctualtions does happen with search engines. Just keep writing on your site and submit the sitemap by creating a sitemap for your site. You may use XML Sitemap generator plugin for wordpress.
May be penalty or may be just temporary de-indexed. You should wait a little longer. Btw, pinging too much in short time could be considered as spamming.