Creator formula deleting brackets on its own

Creator formula deleting brackets on its own

I am trying to use the following formula in a formula field.  Creator seems to be deleting my brackets and causing the formula to be wrong.

((Funding_Request_Amount  -  (Funding_Request_Amount  *  0.065)) - ((Num_of_Empoloees  /  20 ) *  1000)) * 0.2

after saving with no problem and going back into the formula creator has changed the formula to

(Funding_Request_Amount  -  Funding_Request_Amount  *  0.065  -  Num_of_Empoloees  /  20  *  1000 * 0.2)

All brackets gone and formula no worky