Cell References Changed when saving? (SFTGlobalID_)

Question

I'm using IF( formulas to create an inventory control database. On a list of raw food materials, a "unit count" cell references a production schedule (PS) for 20 or so different recipes made on seperate sheets. The production schedule for each item is a 1, 2, 3 , or 4 (for batch size). The TRUE part of the formula references a value for each ingredient on each recipe and the FALSE returns nothing. Here's an example:
IF(PS :: B2=1,Recipe :: B4,)+IF(PS :: B2=2,Recipe :: B4*2,)+IF(PS :: B2=3,Recipe :: B4*3,)+IF(PS :: B2=4,Recipe :: B4*4,).....etc. for each ingredient on the recipe. (False only needs to return a zero value, as a summation of each value is built in)
I'm sure this isn't the most efficient way to do this but but it works great. However, I made it about 70% of the way through and one of my longer formulas changed all it's cell references to "SFTGlobalID_6C93D7876E0345C39D25C499A3FD1D04" after saving. I have no idea if the formula still works because now I'm over the max charcter limit for a cell.
I tried re-entering the formula with no luck and all of the other formulas work perfectly.
I believe I can work around this by splitting the workload to 2 or more cells, so it isn't necessarily detrimental to the success of the program.
I'm mainly curious as to WHY this happened. I was no where near the character limit before saving.
I've checked other discussions and answers seem to only offer shorter solutions to formulas, and not a reason for the change to begin with.
Does anyone have any idea what the cause of this could be? Any input would be greatly appreciated!
NOTE: I'm not at all opposed to a different approach but my curiosity is getting the best of me here.
Thanks in advance!!
     -Dan

Answer 1

Jerry,
Thanks again. I noticed that Choose seemed sort of limited when looking into it, though still useful.
Right now I'm looking for a way to calculate batch size already given the amount of a prep item I need.
For example:
We use a red sauce in our meals. The inventory will tell me how many quarts I need for the week, and I need it to calculate how many batches are needed and send the amount of ingredients needed for that sauce back to the inventory. One batch is 6.5 qts.
If I need 28 qts of Red Sauce for the week, I need the program to put a 5 in the batch size cell (32.5 qt. yield - we don't make partial batches of anything, so I can't simply use division ). Then I'll just multiply the batch size cell times each ingredient used for a single batch to get the total. Any ideas?
I was thinking more IF( functions with inequalities but I'm guessing there is a better way.
Dan