After combining my old computer stats with stats from new one named Orb my results of WU are decreasing instead of increasing.

Computer ID is 1355669

Where are you seeing the problem? Looking at your statistics at BOINC Stats all of your old work is still accounted for.

On the main page, when I go to computers on this account view under column results number decreased from 130 to 110 for "orb" computer and results for other computers are increasing. Maybe that is normal? I don't know, I didn't notice that before but I wasn't paying attention either.

It is normal for that number to change as it only records the most recent tasks you have completed. You might have seen the number drop faster than normal due to merging computers, but it won't have affected the work you have contributed so far or the total amount of credit you have been given.

Oh, ok. Thanks for the info, I thought something went wrong because of the merge.