Table lines not lining up nicely?

Hey guys. Here’s the table I’m referring to (I have outlined the parts of the table that aren’t lining up properly):

To make the cells under the heading “COUNTING AND PLAYING” I simply split each cell vertically into the number of cells I wanted. I thought that they would all come out the same, but as you can see, for some reason the cell lines aren’t lining up properly in places….

Any thoughts people?

(edit: activated screenshot)

It seems that this is simply a glitch/bug in the viewing of the document; when the document is printed these inconsistencies do not appear, so it is likely due to the older version of LO that I am using.