1) You can verify that this is your problem too by checking your client_state.xml file. Look for the section for ufluids.net then find the line that states the <hostid>xxxxxx</hostid>. If you have value of 0 for the ID# then this is what causes it to keep making new hosts. Now exit the text editor without saving!
2) If you want to fix this shut down Boinc.
3) Go to your account page at the project and click on View computers then write down the host number from the most recent one there.
4) Go back and open client_state.xml.file with a text editor and replace the 0 with the number that you wrote down.
5) Save the file.
6) Restart Boinc