@terziyski   The detail is just that last point: this router not even works at 100 Mbps, that transfer speed only works by the Lan ports.  When connect my isp ONU to the Internet/Wan port of the C58HP, the speed gets limited to max 45 Mbps tested on internet testing web pages and using software for local tests, and the result is the same:  bottleneck is in the wan side of the router and the limit is 45 Mbps. When i connect computer directly to onu by Lan cable, the speeds works well in the range of contracted network speeds. 

Everything suggests that the C58HP features are false advertising, a forgotten device model from Tp Link that despite it's a recent model, it's no more supported and the customers that bought this device are ignored and condemned to live with bugs, fake features  and with the only firmware that it has(the factory fw)   

  @terziyski  I've deactivated the QoS and the speed reached near of the 100 Mbps  

It means that the box where you "tell" your bandwidth to the router,really it's not for that..  i've discovered that this box really what does is set a limit to the bandwidth to the router itself to all the connected devices by lan & wireless,  this should be specified  since it doesn't make sense that there is a box to set a bandwidth limit to ALL the entire router and that does not allow you to set a specified bandwidth limits by ip ranges like it should be

  @terziyski  Yes, i know it..  But what happens is, that in other routers that i have (ex. Archer C80, wr844n...)  the box where you "tell" your bandwidth to the router,in those models you may insert any value, and it didn't act like a limiter (because it's not for that)  I know that it's ONLY to tell the router what's your isp contracted bandwidth..  you could insert any low value and it wasn't going to act like a limiter...  BUT  in this case,in the C58HP, the box where you indicate your bandwidth, it acts like a limiter.. if you insert a low value, your bandwidth will be limited to that...  a strange anecdote..  Hope i explained well. 

we the C58HP owners are waiting for the bandwidth limiter feature,  We know it's possible to do  due to  resemblance to the 941HP physical and internally, they share just the same configuration interface  even...

Thanks for your help