>> Cell heights are automatically and randomly expanded or compressed whenever I paste cut or copied cells.<<
This isn't a bug. Do Edit/Paste Special/Text (or unformatted text, as the case may be).
>>Fonts seem to change on their own as well during similar operations. <<
Never had this happen that I recall. Can you give me a specific example?
>>And when I try to set the font back to what it was, it doesn't take (I'll save the spreadsheet, only to find the wrong font when I open it again).<<
Again, never had this happen personally. Did it happen once or it is a regular occurance? Does it happen like this all the time, or just on selected sheets?
What version are you using?
I think Word is one of the most buggy pieces of software being sold commercially, but I don't think the same of Excel. I can't remember one bug I've ever experienced with the program, and I've used it practically to its limits.
If you start adding items with their associated pricing as you go, then later need to rearrange the items in a logical order, the formulae and the fonts get messed up. There appears to be no useful method to do this, other than selective cell copy/move that takes forever. No easy and simple way to do this in Excel. It is a royal pain in the backside.