score:7
There is a difference in numbering between the Hebrew (Masoretic) text and the Greek and Latin (Septuagint and Vulgate). Psalms 9 and 10 in the Hebrew get combined into one as do Ps 114 & 115. Psalms 116 and 147 both get split in two.
Most Protestant Bibles follow the Hebrew numbering while most Catholic and Orthodox ones follow the Greek.
I suspect the reason for the difference is that the numbers were added to the Hebrew and Greek manuscripts at a later date and there were different opinions as to where one finished and the next began.